Update tokio-minihttp dependencies used (#2889)

There's a few perf improvements in a few of the libraries that may be worth
picking up! This also updates to use a newer Serde library, allowing more
liberal usage of `#[derive(Serialize)]`

frameworks/Rust/tokio-minihttp/Cargo.lock

@@ -2,19 +2,21 @@
 name = "tokio-minihttp"
 version = "0.1.0"
 dependencies = [
- "futures 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures-cpupool 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "httparse 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "postgres 0.13.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "r2d2 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "r2d2_postgres 0.11.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures-cpupool 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "httparse 1.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "postgres 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "r2d2 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "r2d2_postgres 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_json 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-minihttp 0.1.0 (git+https://github.com/tokio-rs/tokio-minihttp)",
- "tokio-proto 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "tokio-proto 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "tokio-service 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "url 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "url 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -23,29 +25,77 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "bufstream"
-version = "0.1.2"
+name = "base64"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "byte-tools"
+version = "0.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "byteorder"
-version = "0.5.3"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "bytes"
+version = "0.4.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "iovec 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "cfg-if"
-version = "0.1.0"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "crossbeam"
-version = "0.2.10"
+name = "constant_time_eq"
+version = "0.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "dtoa"
+name = "crypto-mac"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "constant_time_eq 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "digest"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "generic-array 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "digest-buffer"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byte-tools 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "dtoa"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "fake-simd"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "fallible-iterator"
@@ -54,20 +104,25 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "futures"
-version = "0.1.9"
+version = "0.1.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "futures-cpupool"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "futures 0.1.14 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num_cpus 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "futures-cpupool"
-version = "0.1.2"
+name = "generic-array"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "futures 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "num_cpus 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nodrop 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
+ "typenum 1.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -75,24 +130,43 @@ name = "hex"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "hmac"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "crypto-mac 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "digest 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "httparse"
-version = "1.2.1"
+version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "idna"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "matches 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-bidi 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-normalization 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "iovec"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "matches 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-bidi 0.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-normalization 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "itoa"
-version = "0.2.1"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -111,148 +185,181 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.20"
+version = "0.2.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "log"
-version = "0.3.6"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "matches"
-version = "0.1.4"
+version = "0.1.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "md5"
-version = "0.2.1"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "memchr"
-version = "0.1.11"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "mio"
-version = "0.6.4"
+version = "0.6.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
+ "iovec 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazycell 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "miow 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "miow 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "net2 0.2.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "slab 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "miow"
-version = "0.2.0"
+version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "net2 0.2.26 (registry+https://github.com/rust-lang/crates.io-index)",
+ "net2 0.2.29 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "net2"
-version = "0.2.26"
+version = "0.2.29"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "cfg-if 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "cfg-if 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
  "ws2_32-sys 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "nodrop"
+version = "0.1.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "odds 0.2.25 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "num-traits"
-version = "0.1.36"
+version = "0.1.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "num_cpus"
-version = "1.2.1"
+version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "odds"
+version = "0.2.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "percent-encoding"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "phf"
-version = "0.7.20"
+version = "0.7.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "phf_shared 0.7.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf_shared 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "phf_shared"
-version = "0.7.20"
+version = "0.7.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "siphasher 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "postgres"
-version = "0.13.5"
+version = "0.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bufstream 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fallible-iterator 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "hex 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "postgres-protocol 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "postgres-shared 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "postgres-protocol 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "postgres-shared 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "postgres-protocol"
-version = "0.2.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "byteorder 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "base64 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "bytes 0.4.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "fallible-iterator 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "hex 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "md5 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "memchr 0.1.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "hmac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "md5 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
+ "memchr 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "sha2 0.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "stringprep 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "postgres-shared"
-version = "0.1.0"
+version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "fallible-iterator 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "hex 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "phf 0.7.20 (registry+https://github.com/rust-lang/crates.io-index)",
- "postgres-protocol 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "phf 0.7.21 (registry+https://github.com/rust-lang/crates.io-index)",
+ "postgres-protocol 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "quote"
+version = "0.3.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "r2d2"
-version = "0.7.1"
+version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "antidote 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "log 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "scheduled-thread-pool 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "r2d2_postgres"
-version = "0.11.1"
+version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "postgres 0.13.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "r2d2 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "postgres 0.14.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "r2d2 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -260,13 +367,21 @@ name = "rand"
 version = "0.3.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.24 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "redox_syscall"
-version = "0.1.16"
+version = "0.1.18"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "scheduled-thread-pool"
+version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "antidote 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "scoped-tls"
@@ -275,20 +390,56 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "serde"
-version = "0.9.1"
+version = "1.0.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "serde_derive"
+version = "1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde_derive_internals 0.15.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "serde_derive_internals"
+version = "0.15.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "synom 0.11.3 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "serde_json"
-version = "0.9.1"
+version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "dtoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "itoa 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "num-traits 0.1.36 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 0.9.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "dtoa 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "itoa 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.39 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "sha2"
+version = "0.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "byte-tools 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "digest 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "digest-buffer 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "generic-array 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
+[[package]]
+name = "siphasher"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "slab"
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@@ -306,55 +484,71 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
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frameworks/Rust/tokio-minihttp/Cargo.toml

@@ -6,15 +6,17 @@ authors = ["Gökberk Yaltıraklı <[email protected]>"]
 [dependencies]
 futures = "0.1.9"
 httparse = "1.1"
-serde_json = "0.9"
+serde = "1.0"
+serde_json = "1.0"
+serde_derive = "1.0"
 num_cpus = "1.0"
 tokio-proto = "0.1"
 tokio-service = "0.1"
 tokio-minihttp = { git = "https://github.com/tokio-rs/tokio-minihttp" }
 
-postgres = "0.13"
+postgres = "0.14"
 r2d2 = "0.7"
 futures-cpupool = "0.1"
-r2d2_postgres = "0.11"
+r2d2_postgres = "0.12"
 rand = "0.3"
 url = "1.0"

frameworks/Rust/tokio-minihttp/src/main.rs

@@ -5,8 +5,9 @@ extern crate postgres;
 extern crate r2d2;
 extern crate r2d2_postgres;
 extern crate rand;
-#[macro_use]
 extern crate serde_json;
+#[macro_use]
+extern crate serde_derive;
 extern crate tokio_minihttp;
 extern crate tokio_proto;
 extern crate tokio_service;
@@ -21,7 +22,6 @@ use futures::{BoxFuture, Future, Stream};
 use futures_cpupool::{CpuPool, CpuFuture};
 use r2d2_postgres::{TlsMode, PostgresConnectionManager};
 use rand::Rng;
-use serde_json::Value;
 use tokio_minihttp::{Request, Response, Http};
 use tokio_proto::TcpServer;
 use tokio_service::Service;
@@ -33,11 +33,17 @@ struct Techempower {
 }
 
 #[allow(bad_style)]
+#[derive(Serialize)]
 struct WorldRow {
     id: i32,
     randomNumber: i32,
 }
 
+#[derive(Serialize)]
+struct Message<'a> {
+    message: &'a str,
+}
+
 impl Service for Techempower {
     type Request = Request;
     type Response = Response;
@@ -71,24 +77,20 @@ impl Techempower {
     }
 
     fn json(&self) -> Response {
-        let json = json!({ "message": "Hello, World!" });
+        let json = Message { message: "Hello, World!" };
 
         let mut resp = Response::new();
         resp.header("Content-Type", "application/json")
-            .body(&json.to_string());
+            .body(&serde_json::to_string(&json).unwrap());
         return resp
     }
 
     fn db(&self) -> BoxFuture<Response, io::Error> {
         let msg = self.random_world_row();
         msg.map(|msg| {
-            let json = json!({
-                "id": msg.id,
-                "randomNumber": msg.randomNumber,
-            });
             let mut resp = Response::new();
             resp.header("Content-Type", "application/json")
-                .body(&json.to_string());
+                .body(&serde_json::to_string(&msg).unwrap());
             return resp
         }).boxed()
     }
@@ -107,14 +109,14 @@ impl Techempower {
         stream::futures_unordered(stream).collect().map(|list| {
             let mut json = Vec::new();
             for row in list {
-                json.push(json!({
-                    "id": row.id,
-                    "randomNumber": row.randomNumber,
-                }));
+                json.push(WorldRow {
+                    id: row.id,
+                    randomNumber: row.randomNumber,
+                });
             }
             let mut resp = Response::new();
             resp.header("Content-Type", "application/json")
-                .body(&Value::Array(json).to_string());
+                .body(&serde_json::to_string(&json).unwrap());
             return resp
         }).boxed()
     }
@@ -128,7 +130,7 @@ impl Techempower {
             })?;
 
             let stmt = conn.prepare_cached("SELECT id,randomNumber \
-                                              FROM World WHERE id = $1")?;
+                                            FROM World WHERE id = $1")?;
             let rows = stmt.query(&[&random_id])?;
             let row = rows.get(0);