From 087333a227dab1ba28cdab6bb32ffea9031cbcbc Mon Sep 17 00:00:00 2001
From: "Dustin J. Mitchell" <dustin@mozilla.com>
Date: Wed, 25 Nov 2020 23:16:05 -0500
Subject: [PATCH] refactor sync server into modules

---
 Cargo.lock                               | 1388 +++++++++++++++++++++-
 sync-server/Cargo.toml                   |    5 +
 sync-server/src/api/add_version.rs       |   25 +
 sync-server/src/api/get_child_version.rs |   19 +
 sync-server/src/api/mod.rs               |    2 +
 sync-server/src/lib.rs                   |   86 --
 sync-server/src/main.rs                  |   24 +
 sync-server/src/server.rs                |   34 +
 sync-server/src/types.rs                 |   23 +
 9 files changed, 1504 insertions(+), 102 deletions(-)
 create mode 100644 sync-server/src/api/add_version.rs
 create mode 100644 sync-server/src/api/get_child_version.rs
 create mode 100644 sync-server/src/api/mod.rs
 delete mode 100644 sync-server/src/lib.rs
 create mode 100644 sync-server/src/main.rs
 create mode 100644 sync-server/src/server.rs
 create mode 100644 sync-server/src/types.rs

diff --git a/Cargo.lock b/Cargo.lock
index c5ee93f04..6f24b0e1f 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1,5 +1,266 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "actix-codec"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "78d1833b3838dbe990df0f1f87baf640cf6146e898166afe401839d1b001e570"
+dependencies = [
+ "bitflags",
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "log",
+ "pin-project 0.4.27",
+ "tokio",
+ "tokio-util",
+]
+
+[[package]]
+name = "actix-connect"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "177837a10863f15ba8d3ae3ec12fac1099099529ed20083a27fdfe247381d0dc"
+dependencies = [
+ "actix-codec",
+ "actix-rt",
+ "actix-service",
+ "actix-utils",
+ "derive_more",
+ "either",
+ "futures-util",
+ "http",
+ "log",
+ "trust-dns-proto",
+ "trust-dns-resolver",
+]
+
+[[package]]
+name = "actix-http"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "452299e87817ae5673910e53c243484ca38be3828db819b6011736fc6982e874"
+dependencies = [
+ "actix-codec",
+ "actix-connect",
+ "actix-rt",
+ "actix-service",
+ "actix-threadpool",
+ "actix-utils",
+ "base64 0.13.0",
+ "bitflags",
+ "brotli2",
+ "bytes",
+ "cookie",
+ "copyless",
+ "derive_more",
+ "either",
+ "encoding_rs",
+ "flate2",
+ "futures-channel",
+ "futures-core",
+ "futures-util",
+ "fxhash",
+ "h2",
+ "http",
+ "httparse",
+ "indexmap",
+ "itoa",
+ "language-tags",
+ "lazy_static",
+ "log",
+ "mime",
+ "percent-encoding",
+ "pin-project 1.0.2",
+ "rand 0.7.3",
+ "regex",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "sha-1",
+ "slab",
+ "time 0.2.23",
+]
+
+[[package]]
+name = "actix-macros"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a60f9ba7c4e6df97f3aacb14bb5c0cd7d98a49dcbaed0d7f292912ad9a6a3ed2"
+dependencies = [
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "actix-router"
+version = "0.2.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bbd1f7dbda1645bf7da33554db60891755f6c01c1b2169e2f4c492098d30c235"
+dependencies = [
+ "bytestring",
+ "http",
+ "log",
+ "regex",
+ "serde",
+]
+
+[[package]]
+name = "actix-rt"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "143fcc2912e0d1de2bcf4e2f720d2a60c28652ab4179685a1ee159e0fb3db227"
+dependencies = [
+ "actix-macros",
+ "actix-threadpool",
+ "copyless",
+ "futures-channel",
+ "futures-util",
+ "smallvec",
+ "tokio",
+]
+
+[[package]]
+name = "actix-server"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "45407e6e672ca24784baa667c5d32ef109ccdd8d5e0b5ebb9ef8a67f4dfb708e"
+dependencies = [
+ "actix-codec",
+ "actix-rt",
+ "actix-service",
+ "actix-utils",
+ "futures-channel",
+ "futures-util",
+ "log",
+ "mio",
+ "mio-uds",
+ "num_cpus",
+ "slab",
+ "socket2",
+]
+
+[[package]]
+name = "actix-service"
+version = "1.0.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0052435d581b5be835d11f4eb3bce417c8af18d87ddf8ace99f8e67e595882bb"
+dependencies = [
+ "futures-util",
+ "pin-project 0.4.27",
+]
+
+[[package]]
+name = "actix-testing"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "47239ca38799ab74ee6a8a94d1ce857014b2ac36f242f70f3f75a66f691e791c"
+dependencies = [
+ "actix-macros",
+ "actix-rt",
+ "actix-server",
+ "actix-service",
+ "log",
+ "socket2",
+]
+
+[[package]]
+name = "actix-threadpool"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d209f04d002854b9afd3743032a27b066158817965bf5d036824d19ac2cc0e30"
+dependencies = [
+ "derive_more",
+ "futures-channel",
+ "lazy_static",
+ "log",
+ "num_cpus",
+ "parking_lot",
+ "threadpool",
+]
+
+[[package]]
+name = "actix-tls"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "24789b7d7361cf5503a504ebe1c10806896f61e96eca9a7350e23001aca715fb"
+dependencies = [
+ "actix-codec",
+ "actix-service",
+ "actix-utils",
+ "futures-util",
+]
+
+[[package]]
+name = "actix-utils"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e9022dec56632d1d7979e59af14f0597a28a830a9c1c7fec8b2327eb9f16b5a"
+dependencies = [
+ "actix-codec",
+ "actix-rt",
+ "actix-service",
+ "bitflags",
+ "bytes",
+ "either",
+ "futures-channel",
+ "futures-sink",
+ "futures-util",
+ "log",
+ "pin-project 0.4.27",
+ "slab",
+]
+
+[[package]]
+name = "actix-web"
+version = "3.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3a89a7b133e734f6d1e555502d450408ae04105826aef7e3605019747d3ac732"
+dependencies = [
+ "actix-codec",
+ "actix-http",
+ "actix-macros",
+ "actix-router",
+ "actix-rt",
+ "actix-server",
+ "actix-service",
+ "actix-testing",
+ "actix-threadpool",
+ "actix-tls",
+ "actix-utils",
+ "actix-web-codegen",
+ "awc",
+ "bytes",
+ "derive_more",
+ "encoding_rs",
+ "futures-channel",
+ "futures-core",
+ "futures-util",
+ "fxhash",
+ "log",
+ "mime",
+ "pin-project 1.0.2",
+ "regex",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+ "socket2",
+ "time 0.2.23",
+ "tinyvec",
+ "url",
+]
+
+[[package]]
+name = "actix-web-codegen"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ad26f77093333e0e7c6ffe54ebe3582d908a104e448723eec6d43d08b07143fb"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "addr2line"
 version = "0.14.0"
@@ -30,7 +291,7 @@ version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ee49baf6cb617b853aa8d93bf420db2383fab46d314482ca2803b40d5fde979b"
 dependencies = [
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -58,6 +319,17 @@ dependencies = [
  "wait-timeout",
 ]
 
+[[package]]
+name = "async-trait"
+version = "0.1.42"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8d3a45e77e34375a7923b1e8febb049bb011f064714a8e17a1a616fef01da13d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -66,7 +338,7 @@ checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
 dependencies = [
  "hermit-abi",
  "libc",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -81,6 +353,30 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
 
+[[package]]
+name = "awc"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e9056f5e27b0d56bedd82f78eceaba0bcddcbbcbbefae3cd0a53994b28c96ff5"
+dependencies = [
+ "actix-codec",
+ "actix-http",
+ "actix-rt",
+ "actix-service",
+ "base64 0.13.0",
+ "bytes",
+ "cfg-if 1.0.0",
+ "derive_more",
+ "futures-core",
+ "log",
+ "mime",
+ "percent-encoding",
+ "rand 0.7.3",
+ "serde",
+ "serde_json",
+ "serde_urlencoded",
+]
+
 [[package]]
 name = "backtrace"
 version = "0.3.55"
@@ -95,12 +391,24 @@ dependencies = [
  "rustc-demangle",
 ]
 
+[[package]]
+name = "base-x"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4521f3e3d031370679b3b140beb36dfe4801b09ac77e30c61941f97df3ef28b"
+
 [[package]]
 name = "base64"
 version = "0.12.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3441f0f7b02788e948e47f457ca01f1d7e6d92c693bc132c22b087d3141c03ff"
 
+[[package]]
+name = "base64"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
+
 [[package]]
 name = "bit-set"
 version = "0.5.2"
@@ -133,6 +441,35 @@ dependencies = [
  "constant_time_eq",
 ]
 
+[[package]]
+name = "block-buffer"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "brotli-sys"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4445dea95f4c2b41cde57cc9fee236ae4dbae88d8fcbdb4750fc1bb5d86aaecd"
+dependencies = [
+ "cc",
+ "libc",
+]
+
+[[package]]
+name = "brotli2"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0cb036c3eade309815c15ddbacec5b22c4d1f3983a774ab2eac2e3e9ea85568e"
+dependencies = [
+ "brotli-sys",
+ "libc",
+]
+
 [[package]]
 name = "bstr"
 version = "0.2.14"
@@ -157,6 +494,21 @@ version = "1.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
 
+[[package]]
+name = "bytes"
+version = "0.5.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e4cec68f03f32e44924783795810fa50a7035d8c8ebe78580ad7e6c703fba38"
+
+[[package]]
+name = "bytestring"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc7c05fa5172da78a62d9949d662d2ac89d4cc7355d7b49adee5163f1fb3f363"
+dependencies = [
+ "bytes",
+]
+
 [[package]]
 name = "cc"
 version = "1.0.65"
@@ -185,8 +537,8 @@ dependencies = [
  "num-integer",
  "num-traits",
  "serde",
- "time",
- "winapi",
+ "time 0.1.44",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -213,12 +565,59 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "cloudabi"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4344512281c643ae7638bbabc3af17a11307803ec8f0fcad9fae512a8bf36467"
+dependencies = [
+ "bitflags",
+]
+
+[[package]]
+name = "const_fn"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c478836e029dcef17fb47c89023448c64f781a046e0300e257ad8225ae59afab"
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
+[[package]]
+name = "cookie"
+version = "0.14.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "784ad0fbab4f3e9cef09f20e0aea6000ae08d2cb98ac4c0abc53df18803d702f"
+dependencies = [
+ "percent-encoding",
+ "time 0.2.23",
+ "version_check",
+]
+
+[[package]]
+name = "copyless"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2df960f5d869b2dd8532793fde43eb5427cceb126c929747a26823ab0eeb536"
+
+[[package]]
+name = "cpuid-bool"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8aebca1129a03dc6dc2b127edd729435bbc4a37e1d5f4d7513165089ceb02634"
+
+[[package]]
+name = "crc32fast"
+version = "1.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81156fece84ab6a9f2afdb109ce3ae577e42b1228441eded99bd77f627953b1a"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
 [[package]]
 name = "crossbeam-utils"
 version = "0.7.2"
@@ -252,12 +651,32 @@ dependencies = [
  "memchr",
 ]
 
+[[package]]
+name = "derive_more"
+version = "0.99.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41cb0e6161ad61ed084a36ba71fbba9e3ac5aee3606fb607fe08da6acbcf3d8c"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "difference"
 version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "524cbf6897b527295dff137cec09ecf3a05f4fddffd7dfcd1585403449e74198"
 
+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array",
+]
+
 [[package]]
 name = "dirs"
 version = "1.0.5"
@@ -266,21 +685,54 @@ checksum = "3fd78930633bd1c6e35c4b42b1df7b0cbc6bc191146e512bb3bedf243fcc3901"
 dependencies = [
  "libc",
  "redox_users",
- "winapi",
+ "winapi 0.3.9",
 ]
 
+[[package]]
+name = "discard"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
+
 [[package]]
 name = "doc-comment"
 version = "0.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fea41bba32d969b513997752735605054bc0dfa92b4c56bf1189f2e174be7a10"
 
+[[package]]
+name = "either"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
+
 [[package]]
 name = "encode_unicode"
 version = "0.3.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a357d28ed41a50f9c765dbfe56cbc04a64e53e5fc58ba79fbc34c10ef3df831f"
 
+[[package]]
+name = "encoding_rs"
+version = "0.8.26"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "801bbab217d7f79c0062f4f7205b5d4427c6d1a7bd7aafdd1475f7c59d62b283"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
+[[package]]
+name = "enum-as-inner"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7c5f0096a91d210159eceb2ff5e1c4da18388a170e1e3ce948aac9c8fdbbf595"
+dependencies = [
+ "heck",
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "failure"
 version = "0.1.8"
@@ -303,6 +755,18 @@ dependencies = [
  "synstructure",
 ]
 
+[[package]]
+name = "flate2"
+version = "1.0.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7411863d55df97a419aa64cb4d2f167103ea9d767e2c54a1868b7ac3f6b47129"
+dependencies = [
+ "cfg-if 1.0.0",
+ "crc32fast",
+ "libc",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "float-cmp"
 version = "0.8.0"
@@ -318,12 +782,140 @@ version = "1.0.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3f9eec918d3f24069decb9af1554cad7c880e2da24a9afd88aca000531ab82c1"
 
+[[package]]
+name = "form_urlencoded"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ece68d15c92e84fa4f19d3780f1294e5ca82a78a6d515f1efaabcc144688be00"
+dependencies = [
+ "matches",
+ "percent-encoding",
+]
+
 [[package]]
 name = "fuchsia-cprng"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a06f77d526c1a601b7c4cdd98f54b5eaabffc14d5f2f0296febdc7f357c6d3ba"
 
+[[package]]
+name = "fuchsia-zircon"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2e9763c69ebaae630ba35f74888db465e49e259ba1bc0eda7d06f4a067615d82"
+dependencies = [
+ "bitflags",
+ "fuchsia-zircon-sys",
+]
+
+[[package]]
+name = "fuchsia-zircon-sys"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3dcaa9ae7725d12cdb85b3ad99a434db70b468c09ded17e012d86b5c1010f7a7"
+
+[[package]]
+name = "futures"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b3b0c040a1fe6529d30b3c5944b280c7f0dcb2930d2c3062bca967b602583d0"
+dependencies = [
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+ "proc-macro2",
+ "quote",
+ "syn",
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+
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+dependencies = [
+ "futures-channel",
+ "futures-core",
+ "futures-io",
+ "futures-macro",
+ "futures-sink",
+ "futures-task",
+ "memchr",
+ "pin-project 1.0.2",
+ "pin-utils",
+ "proc-macro-hack",
+ "proc-macro-nested",
+ "slab",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c31b6d751ae2c7f11320402d34e41349dd1016f8d5d45e48c4312bc8625af50c"
+dependencies = [
+ "byteorder",
+]
+
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+dependencies = [
+ "typenum",
+ "version_check",
+]
+
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@@ -341,6 +933,41 @@ version = "0.23.0"
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 checksum = "f6503fe142514ca4799d4c26297c4248239fe8838d827db6bd6065c6ed29a6ce"
 
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+dependencies = [
+ "bytes",
+ "fnv",
+ "futures-core",
+ "futures-sink",
+ "futures-util",
+ "http",
+ "indexmap",
+ "slab",
+ "tokio",
+ "tokio-util",
+ "tracing",
+ "tracing-futures",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7afe4a420e3fe79967a00898cc1f4db7c8a49a9333a29f8a4bd76a253d5cd04"
+
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+checksum = "20564e78d53d2bb135c343b3f47714a56af2061f1c928fdb541dc7b9fdd94205"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "hermit-abi"
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@@ -350,6 +977,85 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
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+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3c731c3e10504cc8ed35cfe2f1db4c9274c3d35fa486e3b31df46f068ef3e867"
+dependencies = [
+ "libc",
+ "match_cfg",
+ "winapi 0.3.9",
+]
+
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+dependencies = [
+ "bytes",
+ "fnv",
+ "itoa",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd179ae861f0c2e53da70d892f5f3029f9594be0c41dc5269cd371691b1dc2f9"
+
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+dependencies = [
+ "matches",
+ "unicode-bidi",
+ "unicode-normalization",
+]
+
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+dependencies = [
+ "autocfg 1.0.1",
+ "hashbrown",
+]
+
+[[package]]
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+checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
+dependencies = [
+ "cfg-if 1.0.0",
+]
+
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2b3ea6ff95e175473f8ffe6a7eb7c00d054240321b84c57051175fe3c1e075e"
+dependencies = [
+ "libc",
+]
+
+[[package]]
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+checksum = "f7e2f18aece9709094573a9f24f483c4f65caa4298e2f7ae1b71cc65d853fad7"
+dependencies = [
+ "socket2",
+ "widestring",
+ "winapi 0.3.9",
+ "winreg",
+]
+
 [[package]]
 name = "itoa"
 version = "0.4.6"
@@ -365,6 +1071,16 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "kernel32-sys"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
+
 [[package]]
 name = "kv"
 version = "0.10.0"
@@ -378,6 +1094,12 @@ dependencies = [
  "toml",
 ]
 
+[[package]]
+name = "language-tags"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a91d884b6667cd606bb5a69aa0c99ba811a115fc68915e7056ec08a46e93199a"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -390,6 +1112,12 @@ version = "0.2.80"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4d58d1b70b004888f764dfbf6a26a3b0342a1632d33968e4a179d8011c760614"
 
+[[package]]
+name = "linked-hash-map"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8dd5a6d5999d9907cda8ed67bbd137d3af8085216c2ac62de5be860bd41f304a"
+
 [[package]]
 name = "lmdb-rkv"
 version = "0.12.3"
@@ -413,6 +1141,15 @@ dependencies = [
  "pkg-config",
 ]
 
+[[package]]
+name = "lock_api"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dd96ffd135b2fd7b973ac026d28085defbe8983df057ced3eb4f2130b0831312"
+dependencies = [
+ "scopeguard",
+]
+
 [[package]]
 name = "log"
 version = "0.4.11"
@@ -422,12 +1159,39 @@ dependencies = [
  "cfg-if 0.1.10",
 ]
 
+[[package]]
+name = "lru-cache"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "31e24f1ad8321ca0e8a1e0ac13f23cb668e6f5466c2c57319f6a5cf1cc8e3b1c"
+dependencies = [
+ "linked-hash-map",
+]
+
+[[package]]
+name = "match_cfg"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ffbee8634e0d45d258acb448e7eaab3fce7a0a467395d4d9f228e3c1f01fb2e4"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ffc5c5338469d4d3ea17d269fa8ea3512ad247247c30bd2df69e68309ed0a08"
+
 [[package]]
 name = "memchr"
 version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
+[[package]]
+name = "mime"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a60c7ce501c71e03a9c9c0d35b861413ae925bd979cc7a4e30d060069aaac8d"
+
 [[package]]
 name = "miniz_oxide"
 version = "0.4.3"
@@ -438,6 +1202,59 @@ dependencies = [
  "autocfg 1.0.1",
 ]
 
+[[package]]
+name = "mio"
+version = "0.6.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fce347092656428bc8eaf6201042cb551b8d67855af7374542a92a0fbfcac430"
+dependencies = [
+ "cfg-if 0.1.10",
+ "fuchsia-zircon",
+ "fuchsia-zircon-sys",
+ "iovec",
+ "kernel32-sys",
+ "libc",
+ "log",
+ "miow",
+ "net2",
+ "slab",
+ "winapi 0.2.8",
+]
+
+[[package]]
+name = "mio-uds"
+version = "0.6.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "afcb699eb26d4332647cc848492bbc15eafb26f08d0304550d5aa1f612e066f0"
+dependencies = [
+ "iovec",
+ "libc",
+ "mio",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8c1f2f3b1cf331de6896aabf6e9d55dca90356cc9960cca7eaaf408a355ae919"
+dependencies = [
+ "kernel32-sys",
+ "net2",
+ "winapi 0.2.8",
+ "ws2_32-sys",
+]
+
+[[package]]
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+version = "0.2.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ebc3ec692ed7c9a255596c67808dee269f64655d8baf7b4f0638e51ba1d6853"
+dependencies = [
+ "cfg-if 0.1.10",
+ "libc",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "normalize-line-endings"
 version = "0.3.0"
@@ -463,6 +1280,16 @@ dependencies = [
  "autocfg 1.0.1",
 ]
 
+[[package]]
+name = "num_cpus"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05499f3756671c15885fee9034446956fff3f243d6077b91e5767df161f766b3"
+dependencies = [
+ "hermit-abi",
+ "libc",
+]
+
 [[package]]
 name = "object"
 version = "0.22.0"
@@ -475,6 +1302,102 @@ version = "1.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13bd41f508810a131401606d54ac32a467c97172d74ba7662562ebba5ad07fa0"
 
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d7744ac029df22dca6284efe4e898991d28e3085c706c972bcd7da4a27a15eb"
+dependencies = [
+ "instant",
+ "lock_api",
+ "parking_lot_core",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c361aa727dd08437f2f1447be8b59a33b0edd15e0fcee698f935613d9efbca9b"
+dependencies = [
+ "cfg-if 0.1.10",
+ "cloudabi 0.1.0",
+ "instant",
+ "libc",
+ "redox_syscall",
+ "smallvec",
+ "winapi 0.3.9",
+]
+
+[[package]]
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+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d4fd5641d01c8f18a23da7b6fe29298ff4b55afcccdf78973b24cf3175fee32e"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ffbc8e94b38ea3d2d8ba92aea2983b503cd75d0888d75b86bb37970b5698e15"
+dependencies = [
+ "pin-project-internal 0.4.27",
+]
+
+[[package]]
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+checksum = "9ccc2237c2c489783abd8c4c80e5450fc0e98644555b1364da68cc29aa151ca7"
+dependencies = [
+ "pin-project-internal 1.0.2",
+]
+
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+checksum = "65ad2ae56b6abe3a1ee25f15ee605bacadb9a764edaba9c2bf4103800d4a1895"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8e8d2bf0b23038a4424865103a4df472855692821aab4e4f5c3312d461d9e5f"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c917123afa01924fc84bb20c4c03f004d9c38e5127e3c039bbf7f4b9c76a2f6b"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6b063f57ec186e6140e2b8b6921e5f1bd89c7356dda5b33acc5401203ca6131c"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
+
 [[package]]
 name = "pkg-config"
 version = "0.3.19"
@@ -530,6 +1453,18 @@ dependencies = [
  "unicode-width",
 ]
 
+[[package]]
+name = "proc-macro-hack"
+version = "0.5.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dbf0c48bc1d91375ae5c3cd81e3722dff1abcf81a30960240640d223f59fe0e5"
+
+[[package]]
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eba180dafb9038b050a4c280019bbedf9f2467b61e5d892dcad585bb57aadc5a"
+
 [[package]]
 name = "proc-macro2"
 version = "1.0.24"
@@ -584,7 +1519,7 @@ dependencies = [
  "libc",
  "rand_core 0.3.1",
  "rdrand",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -603,7 +1538,7 @@ dependencies = [
  "rand_os",
  "rand_pcg",
  "rand_xorshift",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -698,7 +1633,7 @@ checksum = "1166d5c91dc97b88d1decc3285bb0a99ed84b05cfd0bc2341bdf2d43fc41e39b"
 dependencies = [
  "libc",
  "rand_core 0.4.2",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -707,12 +1642,12 @@ version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
 dependencies = [
- "cloudabi",
+ "cloudabi 0.0.3",
  "fuchsia-cprng",
  "libc",
  "rand_core 0.4.2",
  "rdrand",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -793,7 +1728,17 @@ version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
 dependencies = [
- "winapi",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "resolv-conf"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "52e44394d2086d010551b14b53b1f24e31647570cd1deb0379e2c21b329aba00"
+dependencies = [
+ "hostname",
+ "quick-error",
 ]
 
 [[package]]
@@ -808,7 +1753,7 @@ dependencies = [
  "spin",
  "untrusted",
  "web-sys",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -838,7 +1783,7 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9dab61250775933275e84053ac235621dfb739556d5c54a2f2e9313b7cf43a19"
 dependencies = [
- "base64",
+ "base64 0.12.3",
  "blake2b_simd",
  "constant_time_eq",
  "crossbeam-utils",
@@ -850,6 +1795,15 @@ version = "0.1.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e3bad0ee36814ca07d7968269dd4b7ec89ec2da10c4bb613928d3077083c232"
 
+[[package]]
+name = "rustc_version"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
+dependencies = [
+ "semver",
+]
+
 [[package]]
 name = "rusty-fork"
 version = "0.2.2"
@@ -868,6 +1822,27 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
 
+[[package]]
+name = "scopeguard"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d29ab0c6d3fc0ee92fe66e2d99f700eab17a8d57d1c1d3b748380fb20baa78cd"
+
+[[package]]
+name = "semver"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
+dependencies = [
+ "semver-parser",
+]
+
+[[package]]
+name = "semver-parser"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "388a1df253eca08550bef6c72392cfe7c30914bf41df5269b68cbd6ff8f570a3"
+
 [[package]]
 name = "serde"
 version = "1.0.117"
@@ -899,12 +1874,134 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_urlencoded"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edfa57a7f8d9c1d260a549e7224100f6c43d43f9103e06dd8b4095a9b2b43ce9"
+dependencies = [
+ "form_urlencoded",
+ "itoa",
+ "ryu",
+ "serde",
+]
+
+[[package]]
+name = "sha-1"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce3cdf1b5e620a498ee6f2a171885ac7e22f0e12089ec4b3d22b84921792507c"
+dependencies = [
+ "block-buffer",
+ "cfg-if 1.0.0",
+ "cpuid-bool",
+ "digest",
+ "opaque-debug",
+]
+
+[[package]]
+name = "sha1"
+version = "0.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2579985fda508104f7587689507983eadd6a6e84dd35d6d115361f530916fa0d"
+
+[[package]]
+name = "signal-hook-registry"
+version = "1.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce32ea0c6c56d5eacaeb814fbed9960547021d3edd010ded1425f180536b20ab"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "slab"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c111b5bd5695e56cffe5129854aa230b39c93a305372fdbb2668ca2394eea9f8"
+
+[[package]]
+name = "smallvec"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7acad6f34eb9e8a259d3283d1e8c1d34d7415943d4895f65cc73813c7396fc85"
+
+[[package]]
+name = "socket2"
+version = "0.3.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c29947abdee2a218277abeca306f25789c938e500ea5a9d4b12a5a504466902"
+dependencies = [
+ "cfg-if 1.0.0",
+ "libc",
+ "redox_syscall",
+ "winapi 0.3.9",
+]
+
 [[package]]
 name = "spin"
 version = "0.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
 
+[[package]]
+name = "standback"
+version = "0.2.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cf906c8b8fc3f6ecd1046e01da1d8ddec83e48c8b08b84dcc02b585a6bedf5a8"
+dependencies = [
+ "version_check",
+]
+
+[[package]]
+name = "stdweb"
+version = "0.4.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d022496b16281348b52d0e30ae99e01a73d737b2f45d38fed4edf79f9325a1d5"
+dependencies = [
+ "discard",
+ "rustc_version",
+ "stdweb-derive",
+ "stdweb-internal-macros",
+ "stdweb-internal-runtime",
+ "wasm-bindgen",
+]
+
+[[package]]
+name = "stdweb-derive"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c87a60a40fccc84bef0652345bbbbbe20a605bf5d0ce81719fc476f5c03b50ef"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "serde",
+ "serde_derive",
+ "syn",
+]
+
+[[package]]
+name = "stdweb-internal-macros"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "58fa5ff6ad0d98d1ffa8cb115892b6e69d67799f6763e162a1c9db421dc22e11"
+dependencies = [
+ "base-x",
+ "proc-macro2",
+ "quote",
+ "serde",
+ "serde_derive",
+ "serde_json",
+ "sha1",
+ "syn",
+]
+
+[[package]]
+name = "stdweb-internal-runtime"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "213701ba3370744dcd1a12960caa4843b3d68b4d1c0a5d575e0d65b2ee9d16c0"
+
 [[package]]
 name = "strsim"
 version = "0.8.0"
@@ -925,6 +2022,13 @@ dependencies = [
 [[package]]
 name = "sync-server"
 version = "0.1.0"
+dependencies = [
+ "actix-web",
+ "failure",
+ "serde",
+ "serde_json",
+ "taskchampion",
+]
 
 [[package]]
 name = "synstructure"
@@ -987,7 +2091,7 @@ dependencies = [
  "rand 0.7.3",
  "redox_syscall",
  "remove_dir_all",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -998,7 +2102,7 @@ checksum = "edd106a334b7657c10b7c540a0106114feadeb4dc314513e97df481d5d966f42"
 dependencies = [
  "byteorder",
  "dirs",
- "winapi",
+ "winapi 0.3.9",
 ]
 
 [[package]]
@@ -1039,6 +2143,15 @@ dependencies = [
  "lazy_static",
 ]
 
+[[package]]
+name = "threadpool"
+version = "1.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d050e60b33d41c19108b32cea32164033a9013fe3b46cbd4457559bfbf77afaa"
+dependencies = [
+ "num_cpus",
+]
+
 [[package]]
 name = "time"
 version = "0.1.44"
@@ -1047,7 +2160,94 @@ checksum = "6db9e6914ab8b1ae1c260a4ae7a49b6c5611b40328a735b21862567685e73255"
 dependencies = [
  "libc",
  "wasi 0.10.0+wasi-snapshot-preview1",
- "winapi",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "time"
+version = "0.2.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bcdaeea317915d59b2b4cd3b5efcd156c309108664277793f5351700c02ce98b"
+dependencies = [
+ "const_fn",
+ "libc",
+ "standback",
+ "stdweb",
+ "time-macros",
+ "version_check",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "time-macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "957e9c6e26f12cb6d0dd7fc776bb67a706312e7299aed74c8dd5b17ebb27e2f1"
+dependencies = [
+ "proc-macro-hack",
+ "time-macros-impl",
+]
+
+[[package]]
+name = "time-macros-impl"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5c3be1edfad6027c69f5491cf4cb310d1a71ecd6af742788c6ff8bced86b8fa"
+dependencies = [
+ "proc-macro-hack",
+ "proc-macro2",
+ "quote",
+ "standback",
+ "syn",
+]
+
+[[package]]
+name = "tinyvec"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ccf8dbc19eb42fba10e8feaaec282fb50e2c14b2726d6301dbfeed0f73306a6f"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cda74da7e1a664f795bb1f8a87ec406fb89a02522cf6e50620d016add6dbbf5c"
+
+[[package]]
+name = "tokio"
+version = "0.2.23"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6d7ad61edd59bfcc7e80dababf0f4aed2e6d5e0ba1659356ae889752dfc12ff"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "iovec",
+ "lazy_static",
+ "libc",
+ "memchr",
+ "mio",
+ "mio-uds",
+ "pin-project-lite 0.1.11",
+ "signal-hook-registry",
+ "slab",
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "tokio-util"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be8242891f2b6cbef26a2d7e8605133c2c554cd35b3e4948ea892d6d68436499"
+dependencies = [
+ "bytes",
+ "futures-core",
+ "futures-sink",
+ "log",
+ "pin-project-lite 0.1.11",
+ "tokio",
 ]
 
 [[package]]
@@ -1059,12 +2259,113 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "tracing"
+version = "0.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9f47026cdc4080c07e49b37087de021820269d996f581aac150ef9e5583eefe3"
+dependencies = [
+ "cfg-if 1.0.0",
+ "log",
+ "pin-project-lite 0.2.0",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-core"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f50de3927f93d202783f4513cda820ab47ef17f624b03c096e86ef00c67e6b5f"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "tracing-futures"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ab7bb6f14721aa00656086e9335d363c5c8747bae02ebe32ea2c7dece5689b4c"
+dependencies = [
+ "pin-project 0.4.27",
+ "tracing",
+]
+
 [[package]]
 name = "treeline"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7f741b240f1a48843f9b8e0444fb55fb2a4ff67293b50a9179dfd5ea67f8d41"
 
+[[package]]
+name = "trust-dns-proto"
+version = "0.19.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53861fcb288a166aae4c508ae558ed18b53838db728d4d310aad08270a7d4c2b"
+dependencies = [
+ "async-trait",
+ "backtrace",
+ "enum-as-inner",
+ "futures",
+ "idna",
+ "lazy_static",
+ "log",
+ "rand 0.7.3",
+ "smallvec",
+ "thiserror",
+ "tokio",
+ "url",
+]
+
+[[package]]
+name = "trust-dns-resolver"
+version = "0.19.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6759e8efc40465547b0dfce9500d733c65f969a4cbbfbe3ccf68daaa46ef179e"
+dependencies = [
+ "backtrace",
+ "cfg-if 0.1.10",
+ "futures",
+ "ipconfig",
+ "lazy_static",
+ "log",
+ "lru-cache",
+ "resolv-conf",
+ "smallvec",
+ "thiserror",
+ "tokio",
+ "trust-dns-proto",
+]
+
+[[package]]
+name = "typenum"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+
+[[package]]
+name = "unicode-bidi"
+version = "0.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49f2bd0c6468a8230e1db229cff8029217cf623c767ea5d60bfbd42729ea54d5"
+dependencies = [
+ "matches",
+]
+
+[[package]]
+name = "unicode-normalization"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a13e63ab62dbe32aeee58d1c5408d35c36c392bba5d9d3142287219721afe606"
+dependencies = [
+ "tinyvec",
+]
+
+[[package]]
+name = "unicode-segmentation"
+version = "1.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bb0d2e7be6ae3a5fa87eed5fb451aff96f2573d2694942e40543ae0bbe19c796"
+
 [[package]]
 name = "unicode-width"
 version = "0.1.8"
@@ -1083,6 +2384,18 @@ version = "0.7.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
 
+[[package]]
+name = "url"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5909f2b0817350449ed73e8bcd81c8c3c8d9a7a5d8acba4b27db277f1868976e"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "matches",
+ "percent-encoding",
+]
+
 [[package]]
 name = "uuid"
 version = "0.8.1"
@@ -1099,6 +2412,12 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
 
+[[package]]
+name = "version_check"
+version = "0.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b5a972e5669d67ba988ce3dc826706fb0a8b01471c088cb0b6110b805cc36aed"
+
 [[package]]
 name = "wait-timeout"
 version = "0.2.0"
@@ -1184,6 +2503,18 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "widestring"
+version = "0.4.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c168940144dd21fd8046987c16a46a33d5fc84eec29ef9dcddc2ac9e31526b7c"
+
+[[package]]
+name = "winapi"
+version = "0.2.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
+
 [[package]]
 name = "winapi"
 version = "0.3.9"
@@ -1194,6 +2525,12 @@ dependencies = [
  "winapi-x86_64-pc-windows-gnu",
 ]
 
+[[package]]
+name = "winapi-build"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
+
 [[package]]
 name = "winapi-i686-pc-windows-gnu"
 version = "0.4.0"
@@ -1205,3 +2542,22 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "winreg"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2986deb581c4fe11b621998a5e53361efe6b48a151178d0cd9eeffa4dc6acc9"
+dependencies = [
+ "winapi 0.3.9",
+]
+
+[[package]]
+name = "ws2_32-sys"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d59cefebd0c892fa2dd6de581e937301d8552cb44489cdff035c6187cb63fa5e"
+dependencies = [
+ "winapi 0.2.8",
+ "winapi-build",
+]
diff --git a/sync-server/Cargo.toml b/sync-server/Cargo.toml
index e2df075ed..d243e2647 100644
--- a/sync-server/Cargo.toml
+++ b/sync-server/Cargo.toml
@@ -7,3 +7,8 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+actix-web = "3.3.0"
+failure = "0.1.8"
+serde = "1.0.117"
+serde_json = "1.0.59"
+taskchampion = { path = "../taskchampion" }
diff --git a/sync-server/src/api/add_version.rs b/sync-server/src/api/add_version.rs
new file mode 100644
index 000000000..75398ecd9
--- /dev/null
+++ b/sync-server/src/api/add_version.rs
@@ -0,0 +1,25 @@
+use crate::server::SyncServer;
+use crate::types::{ClientId, HistorySegment, VersionId};
+use actix_web::{error, http::StatusCode, post, web, HttpResponse, Responder, Result};
+use serde::{Deserialize, Serialize};
+use std::sync::Arc;
+
+/// Request body to add_version
+#[derive(Serialize, Deserialize)]
+pub(crate) struct AddVersionRequest {
+    // TODO: temporary!
+    #[serde(default)]
+    history_segment: HistorySegment,
+}
+
+#[post("/client/{client_id}/add-version/{parent_version_id}")]
+pub(crate) async fn service(
+    data: web::Data<Arc<SyncServer>>,
+    web::Path((client_id, parent_version_id)): web::Path<(ClientId, VersionId)>,
+    body: web::Json<AddVersionRequest>,
+) -> Result<impl Responder> {
+    let result = data
+        .add_version(client_id, parent_version_id, &body.history_segment)
+        .map_err(|e| error::InternalError::new(e, StatusCode::INTERNAL_SERVER_ERROR))?;
+    Ok(HttpResponse::Ok().json(result))
+}
diff --git a/sync-server/src/api/get_child_version.rs b/sync-server/src/api/get_child_version.rs
new file mode 100644
index 000000000..8512e6f4a
--- /dev/null
+++ b/sync-server/src/api/get_child_version.rs
@@ -0,0 +1,19 @@
+use crate::server::SyncServer;
+use crate::types::{ClientId, VersionId};
+use actix_web::{error, get, http::StatusCode, web, HttpResponse, Result};
+use std::sync::Arc;
+
+#[get("/client/{client_id}/get-child-version/{parent_version_id}")]
+pub(crate) async fn service(
+    data: web::Data<Arc<SyncServer>>,
+    web::Path((client_id, parent_version_id)): web::Path<(ClientId, VersionId)>,
+) -> Result<HttpResponse> {
+    let result = data
+        .get_child_version(client_id, parent_version_id)
+        .map_err(|e| error::InternalError::new(e, StatusCode::INTERNAL_SERVER_ERROR))?;
+    if let Some(result) = result {
+        Ok(HttpResponse::Ok().json(result))
+    } else {
+        Err(error::ErrorNotFound("no such version"))
+    }
+}
diff --git a/sync-server/src/api/mod.rs b/sync-server/src/api/mod.rs
new file mode 100644
index 000000000..b955fcc25
--- /dev/null
+++ b/sync-server/src/api/mod.rs
@@ -0,0 +1,2 @@
+pub(crate) mod add_version;
+pub(crate) mod get_child_version;
diff --git a/sync-server/src/lib.rs b/sync-server/src/lib.rs
deleted file mode 100644
index e85125ed0..000000000
--- a/sync-server/src/lib.rs
+++ /dev/null
@@ -1,86 +0,0 @@
-#![allow(clippy::new_without_default)]
-
-use std::collections::HashMap;
-
-type Blob = Vec<u8>;
-
-struct User {
-    // versions, indexed at v-1
-    versions: Vec<Blob>,
-    snapshots: HashMap<u64, Blob>,
-}
-
-pub struct Server {
-    users: HashMap<String, User>,
-}
-
-pub enum VersionAdd {
-    // OK, version added
-    Ok,
-    // Rejected, must be based on the the given version
-    ExpectedVersion(u64),
-}
-
-impl User {
-    fn new() -> User {
-        User {
-            versions: vec![],
-            snapshots: HashMap::new(),
-        }
-    }
-
-    fn get_versions(&self, since_version: u64) -> Vec<Blob> {
-        let last_version = self.versions.len();
-        if last_version == since_version as usize {
-            return vec![];
-        }
-        self.versions[since_version as usize..last_version].to_vec()
-    }
-
-    fn add_version(&mut self, version: u64, blob: Blob) -> VersionAdd {
-        // of by one here: client wants to send version 1 first
-        let expected_version = self.versions.len() as u64 + 1;
-        if version != expected_version {
-            return VersionAdd::ExpectedVersion(expected_version);
-        }
-        self.versions.push(blob);
-
-        VersionAdd::Ok
-    }
-
-    fn add_snapshot(&mut self, version: u64, blob: Blob) {
-        self.snapshots.insert(version, blob);
-    }
-}
-
-impl Server {
-    pub fn new() -> Server {
-        Server {
-            users: HashMap::new(),
-        }
-    }
-
-    fn get_user_mut(&mut self, username: &str) -> &mut User {
-        self.users
-            .entry(username.to_string())
-            .or_insert_with(User::new)
-    }
-
-    /// Get a vector of all versions after `since_version`
-    pub fn get_versions(&self, username: &str, since_version: u64) -> Vec<Blob> {
-        self.users
-            .get(username)
-            .map(|user| user.get_versions(since_version))
-            .unwrap_or_default()
-    }
-
-    /// Add a new version.  If the given version number is incorrect, this responds with the
-    /// appropriate version and expects the caller to try again.
-    pub fn add_version(&mut self, username: &str, version: u64, blob: Blob) -> VersionAdd {
-        self.get_user_mut(username).add_version(version, blob)
-    }
-
-    pub fn add_snapshot(&mut self, username: &str, version: u64, blob: Blob) {
-        self.get_user_mut(username).add_snapshot(version, blob);
-    }
-}
diff --git a/sync-server/src/main.rs b/sync-server/src/main.rs
new file mode 100644
index 000000000..20b7b118f
--- /dev/null
+++ b/sync-server/src/main.rs
@@ -0,0 +1,24 @@
+use actix_web::{App, HttpServer};
+use server::SyncServer;
+use std::sync::Arc;
+
+mod api;
+mod server;
+mod types;
+
+// TODO: use hawk to sign requests
+
+#[actix_web::main]
+async fn main() -> std::io::Result<()> {
+    let sync_server = Arc::new(SyncServer::new());
+
+    HttpServer::new(move || {
+        App::new()
+            .data(sync_server.clone())
+            .service(api::get_child_version::service)
+            .service(api::add_version::service)
+    })
+    .bind("127.0.0.1:8080")?
+    .run()
+    .await
+}
diff --git a/sync-server/src/server.rs b/sync-server/src/server.rs
new file mode 100644
index 000000000..8c4bdfdf2
--- /dev/null
+++ b/sync-server/src/server.rs
@@ -0,0 +1,34 @@
+use crate::types::{AddVersionResult, ClientId, GetVersionResult, HistorySegment, VersionId};
+use failure::Fallible;
+use taskchampion::Uuid;
+
+/// The sync server's implementation; HTTP API method call through to methods on a single
+/// instance of this type.
+pub(crate) struct SyncServer {}
+
+impl SyncServer {
+    pub(crate) fn new() -> Self {
+        Self {}
+    }
+
+    pub(crate) fn get_child_version(
+        &self,
+        _client_id: ClientId,
+        parent_version_id: VersionId,
+    ) -> Fallible<Option<GetVersionResult>> {
+        Ok(Some(GetVersionResult {
+            version_id: Uuid::new_v4(),
+            parent_version_id,
+            history_segment: b"abcd".to_vec(),
+        }))
+    }
+
+    pub(crate) fn add_version(
+        &self,
+        _client_id: ClientId,
+        _parent_version_id: VersionId,
+        _history_segment: &HistorySegment,
+    ) -> Fallible<AddVersionResult> {
+        Ok(AddVersionResult::Ok(Uuid::new_v4()))
+    }
+}
diff --git a/sync-server/src/types.rs b/sync-server/src/types.rs
new file mode 100644
index 000000000..f4b28901d
--- /dev/null
+++ b/sync-server/src/types.rs
@@ -0,0 +1,23 @@
+use serde::{Deserialize, Serialize};
+use taskchampion::Uuid;
+
+pub(crate) type HistorySegment = Vec<u8>;
+pub(crate) type ClientId = Uuid;
+pub(crate) type VersionId = Uuid;
+
+/// Response to get_child_version
+#[derive(Serialize, Deserialize)]
+pub(crate) struct GetVersionResult {
+    pub(crate) version_id: Uuid,
+    pub(crate) parent_version_id: Uuid,
+    pub(crate) history_segment: HistorySegment,
+}
+
+/// Response to add_version
+#[derive(Serialize, Deserialize)]
+pub(crate) enum AddVersionResult {
+    /// OK, version added with the given ID
+    Ok(VersionId),
+    /// Rejected; expected a version with the given parent version
+    ExpectedParentVersion(VersionId),
+}