Add protobuf support

Cargo.toml

@@ -60,6 +60,7 @@ rand = "0.4"
 regex = "0.2"
 serde = "1.0"
 serde_json = "1.0"
+prost = "^0.2"
 sha1 = "0.6"
 smallvec = "0.6"
 time = "0.1"
@@ -109,6 +110,7 @@ members = [
   "examples/diesel",
   "examples/r2d2",
   "examples/json",
+  "examples/protobuf",
   "examples/hello-world",
   "examples/http-proxy",
   "examples/multipart",

examples/protobuf/Cargo.toml

@@ -0,0 +1,15 @@
+[package]
+name = "protobuf-example"
+version = "0.1.0"
+authors = ["kingxsp <jin_hb_zh@126.com>"]
+
+[dependencies]
+bytes = "0.4"
+futures = "0.1"
+env_logger = "*"
+
+prost = "0.2.0"
+prost-derive = "0.2.0"
+
+actix = "0.5"
+actix-web = { path="../../" }

examples/protobuf/client.py

@@ -0,0 +1,66 @@
+# just start server and run client.py
+
+# wget https://github.com/google/protobuf/releases/download/v3.5.1/protobuf-python-3.5.1.zip
+# unzip protobuf-python-3.5.1.zip.1
+# cd protobuf-3.5.1/python/
+# python3.6 setup.py install
+
+# pip3.6 install --upgrade pip
+# pip3.6 install aiohttp
+
+#!/usr/bin/env python
+import test_pb2
+import traceback
+import sys
+
+import asyncio
+import aiohttp
+
+def op():
+    try:
+        obj = test_pb2.MyObj()
+        obj.number = 9
+        obj.name = 'USB'
+
+        #Serialize
+        sendDataStr = obj.SerializeToString()
+        #print serialized string value
+        print('serialized string:', sendDataStr)
+        #------------------------#
+        #  message transmission  #
+        #------------------------#
+        receiveDataStr = sendDataStr
+        receiveData = test_pb2.MyObj()
+
+        #Deserialize
+        receiveData.ParseFromString(receiveDataStr)
+        print('pares serialize string, return: devId = ', receiveData.number, ', name = ', receiveData.name)
+    except(Exception, e):
+        print(Exception, ':', e)
+        print(traceback.print_exc())
+        errInfo = sys.exc_info()
+        print(errInfo[0], ':', errInfo[1])
+
+
+async def fetch(session):
+    obj = test_pb2.MyObj()
+    obj.number = 9
+    obj.name = 'USB'
+    async with session.post('http://localhost:8080/', data=obj.SerializeToString(),
+        headers={"content-type": "application/protobuf"}) as resp:
+        print(resp.status)
+        data = await resp.read()
+        receiveObj = test_pb2.MyObj()
+        receiveObj.ParseFromString(data)
+        print(receiveObj)
+
+async def go(loop):
+    obj = test_pb2.MyObj()
+    obj.number = 9
+    obj.name = 'USB'
+    async with aiohttp.ClientSession(loop=loop) as session:
+        await fetch(session)
+
+loop = asyncio.get_event_loop()
+loop.run_until_complete(go(loop))
+loop.close()

examples/protobuf/src/main.rs

@@ -0,0 +1,50 @@
+extern crate actix;
+extern crate actix_web;
+extern crate bytes;
+extern crate futures;
+extern crate env_logger;
+extern crate prost;
+#[macro_use] 
+extern crate prost_derive;
+
+use actix_web::*;
+use futures::Future;
+
+
+#[derive(Clone, Debug, PartialEq, Message)]
+pub struct MyObj {
+    #[prost(int32, tag="1")]
+    pub number: i32,
+    #[prost(string, tag="2")]
+    pub name: String,
+}
+
+
+/// This handler uses `HttpRequest::json()` for loading serde json object.
+fn index(req: HttpRequest) -> Box<Future<Item=HttpResponse, Error=Error>> {
+    req.protobuf()
+        .from_err()  // convert all errors into `Error`
+        .and_then(|val: MyObj| {
+            println!("model: {:?}", val);
+            Ok(httpcodes::HTTPOk.build().protobuf(val)?)  // <- send response
+        })
+        .responder()
+}
+
+
+fn main() {
+    ::std::env::set_var("RUST_LOG", "actix_web=info");
+    let _ = env_logger::init();
+    let sys = actix::System::new("protobuf-example");
+
+    let addr = HttpServer::new(|| {
+        Application::new()
+            .middleware(middleware::Logger::default())
+            .resource("/", |r| r.method(Method::POST).f(index))})
+        .bind("127.0.0.1:8080").unwrap()
+        .shutdown_timeout(1)
+        .start();
+
+    println!("Started http server: 127.0.0.1:8080");
+    let _ = sys.run();
+}

examples/protobuf/test.proto

@@ -0,0 +1,6 @@
+syntax = "proto3";
+
+message MyObj {
+    int32 number = 1;
+    string name = 2;
+}

examples/protobuf/test_pb2.py

@@ -0,0 +1,76 @@
+# Generated by the protocol buffer compiler.  DO NOT EDIT!
+# source: test.proto
+
+import sys
+_b=sys.version_info[0]<3 and (lambda x:x) or (lambda x:x.encode('latin1'))
+from google.protobuf import descriptor as _descriptor
+from google.protobuf import message as _message
+from google.protobuf import reflection as _reflection
+from google.protobuf import symbol_database as _symbol_database
+from google.protobuf import descriptor_pb2
+# @@protoc_insertion_point(imports)
+
+_sym_db = _symbol_database.Default()
+
+
+
+
+DESCRIPTOR = _descriptor.FileDescriptor(
+  name='test.proto',
+  package='',
+  syntax='proto3',
+  serialized_pb=_b('\n\ntest.proto\"%\n\x05MyObj\x12\x0e\n\x06number\x18\x01 \x01(\x05\x12\x0c\n\x04name\x18\x02 \x01(\tb\x06proto3')
+)
+_sym_db.RegisterFileDescriptor(DESCRIPTOR)
+
+
+
+
+_MYOBJ = _descriptor.Descriptor(
+  name='MyObj',
+  full_name='MyObj',
+  filename=None,
+  file=DESCRIPTOR,
+  containing_type=None,
+  fields=[
+    _descriptor.FieldDescriptor(
+      name='number', full_name='MyObj.number', index=0,
+      number=1, type=5, cpp_type=1, label=1,
+      has_default_value=False, default_value=0,
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+    _descriptor.FieldDescriptor(
+      name='name', full_name='MyObj.name', index=1,
+      number=2, type=9, cpp_type=9, label=1,
+      has_default_value=False, default_value=_b("").decode('utf-8'),
+      message_type=None, enum_type=None, containing_type=None,
+      is_extension=False, extension_scope=None,
+      options=None),
+  ],
+  extensions=[
+  ],
+  nested_types=[],
+  enum_types=[
+  ],
+  options=None,
+  is_extendable=False,
+  syntax='proto3',
+  extension_ranges=[],
+  oneofs=[
+  ],
+  serialized_start=14,
+  serialized_end=51,
+)
+
+DESCRIPTOR.message_types_by_name['MyObj'] = _MYOBJ
+
+MyObj = _reflection.GeneratedProtocolMessageType('MyObj', (_message.Message,), dict(
+  DESCRIPTOR = _MYOBJ,
+  __module__ = 'test_pb2'
+  # @@protoc_insertion_point(class_scope:MyObj)
+  ))
+_sym_db.RegisterMessage(MyObj)
+
+
+# @@protoc_insertion_point(module_scope)

src/error.rs

@@ -15,6 +15,8 @@ use http::{header, StatusCode, Error as HttpError};
 use http::uri::InvalidUriBytes;
 use http_range::HttpRangeParseError;
 use serde_json::error::Error as JsonError;
+use prost::EncodeError as ProtoBufEncodeError;
+use prost::DecodeError as ProtoBufDecodeError;
 pub use url::ParseError as UrlParseError;
 
 // re-exports
@@ -107,6 +109,10 @@ impl From<failure::Error> for Error {
 /// `InternalServerError` for `JsonError`
 impl ResponseError for JsonError {}
 
+/// `InternalServerError` for `ProtoBufEncodeError` `ProtoBufDecodeError`
+impl ResponseError for ProtoBufEncodeError {}
+impl ResponseError for ProtoBufDecodeError {}
+
 /// `InternalServerError` for `UrlParseError`
 impl ResponseError for UrlParseError {}
 
@@ -450,6 +456,44 @@ impl From<JsonError> for JsonPayloadError {
     }
 }
 
+#[derive(Fail, Debug)]
+pub enum ProtoBufPayloadError {
+    /// Payload size is bigger than 256k
+    #[fail(display="Payload size is bigger than 256k")]
+    Overflow,
+    /// Content type error
+    #[fail(display="Content type error")]
+    ContentType,
+    /// Deserialize error
+    #[fail(display="Json deserialize error: {}", _0)]
+    Deserialize(#[cause] ProtoBufDecodeError),
+    /// Payload error
+    #[fail(display="Error that occur during reading payload: {}", _0)]
+    Payload(#[cause] PayloadError),
+}
+
+impl ResponseError for ProtoBufPayloadError {
+
+    fn error_response(&self) -> HttpResponse {
+        match *self {
+            ProtoBufPayloadError::Overflow => httpcodes::HttpPayloadTooLarge.into(),
+            _ => httpcodes::HttpBadRequest.into(),
+        }
+    }
+}
+
+impl From<PayloadError> for ProtoBufPayloadError {
+    fn from(err: PayloadError) -> ProtoBufPayloadError {
+        ProtoBufPayloadError::Payload(err)
+    }
+}
+
+impl From<ProtoBufDecodeError> for ProtoBufPayloadError {
+    fn from(err: ProtoBufDecodeError) -> ProtoBufPayloadError {
+        ProtoBufPayloadError::Deserialize(err)
+    }
+}
+
 /// Errors which can occur when attempting to interpret a segment string as a
 /// valid path segment.
 #[derive(Fail, Debug, PartialEq)]

src/httpmessage.rs

@@ -4,6 +4,7 @@ use bytes::{Bytes, BytesMut};
 use futures::{Future, Stream, Poll};
 use http_range::HttpRange;
 use serde::de::DeserializeOwned;
+use prost::Message;
 use mime::Mime;
 use url::form_urlencoded;
 use encoding::all::UTF_8;
@@ -12,6 +13,7 @@ use encoding::label::encoding_from_whatwg_label;
 use http::{header, HeaderMap};
 
 use json::JsonBody;
+use protobuf::ProtoBufBody;
 use header::Header;
 use multipart::Multipart;
 use error::{ParseError, ContentTypeError,
@@ -209,6 +211,12 @@ pub trait HttpMessage {
         JsonBody::new(self)
     }
 
+    fn protobuf<T: Message + Default>(self) -> ProtoBufBody<Self, T>
+        where Self: Stream<Item=Bytes, Error=PayloadError> + Sized
+    {
+        ProtoBufBody::new(self)
+    }
+
     /// Return stream to http payload processes as multipart.
     ///
     /// Content-type: multipart/form-data;

src/httpresponse.rs

@@ -11,6 +11,7 @@ use http::{StatusCode, Version, HeaderMap, HttpTryFrom, Error as HttpError};
 use http::header::{self, HeaderName, HeaderValue};
 use serde_json;
 use serde::Serialize;
+use prost::Message;
 
 use body::Body;
 use error::Error;
@@ -508,6 +509,22 @@ impl HttpResponseBuilder {
         Ok(self.body(body)?)
     }
 
+    pub fn protobuf<T: Message>(&mut self, value: T) -> Result<HttpResponse, Error> {
+        let mut body = Vec::new();
+        value.encode(&mut body)?;
+        
+        let contains = if let Some(parts) = parts(&mut self.response, &self.err) {
+            parts.headers.contains_key(header::CONTENT_TYPE)
+        } else {
+            true
+        };
+        if !contains {
+            self.header(header::CONTENT_TYPE, "application/protobuf");
+        }
+
+        Ok(self.body(body)?)
+    }
+
     /// Set an empty body and generate `HttpResponse`
     ///
     /// `HttpResponseBuilder` can not be used after this call.

src/lib.rs

@@ -78,6 +78,7 @@ extern crate url;
 extern crate libc;
 extern crate serde;
 extern crate serde_json;
+extern crate prost;
 extern crate flate2;
 extern crate brotli2;
 extern crate encoding;
@@ -111,6 +112,7 @@ mod httprequest;
 mod httpresponse;
 mod info;
 mod json;
+mod protobuf;
 mod route;
 mod router;
 mod resource;
@@ -132,6 +134,7 @@ pub mod server;
 pub use error::{Error, Result, ResponseError};
 pub use body::{Body, Binary};
 pub use json::Json;
+pub use protobuf::ProtoBuf;
 pub use application::Application;
 pub use httpmessage::HttpMessage;
 pub use httprequest::HttpRequest;

src/protobuf.rs

@@ -0,0 +1,113 @@
+use bytes::{Bytes, BytesMut};
+use futures::{Poll, Future, Stream};
+use http::header::CONTENT_LENGTH;
+
+use bytes::IntoBuf;
+use prost::Message;
+
+use error::{Error, ProtoBufPayloadError, PayloadError};
+use handler::Responder;
+use httpmessage::HttpMessage;
+use httprequest::HttpRequest;
+use httpresponse::HttpResponse;
+
+
+#[derive(Debug)]
+pub struct ProtoBuf<T: Message>(pub T);
+
+impl<T: Message> Responder for ProtoBuf<T> {
+    type Item = HttpResponse;
+    type Error = Error;
+
+    fn respond_to(self, _: HttpRequest) -> Result<HttpResponse, Error> {
+        let mut buf = Vec::new();
+        self.0.encode(&mut buf)
+              .map_err(Error::from)
+              .and_then(|()| {
+                Ok(HttpResponse::Ok()
+                    .content_type("application/protobuf")
+                    .body(buf)
+                    .into())
+              })
+    }
+}
+
+
+
+
+pub struct ProtoBufBody<T, U: Message + Default>{
+    limit: usize,
+    ct: &'static str,
+    req: Option<T>,
+    fut: Option<Box<Future<Item=U, Error=ProtoBufPayloadError>>>,
+}
+
+impl<T, U: Message + Default> ProtoBufBody<T, U> {
+
+    /// Create `ProtoBufBody` for request.
+    pub fn new(req: T) -> Self {
+        ProtoBufBody{
+            limit: 262_144,
+            req: Some(req),
+            fut: None,
+            ct: "application/protobuf",
+        }
+    }
+
+    /// Change max size of payload. By default max size is 256Kb
+    pub fn limit(mut self, limit: usize) -> Self {
+        self.limit = limit;
+        self
+    }
+
+    /// Set allowed content type.
+    ///
+    /// By default *application/protobuf* content type is used. Set content type
+    /// to empty string if you want to disable content type check.
+    pub fn content_type(mut self, ct: &'static str) -> Self {
+        self.ct = ct;
+        self
+    }
+}
+
+impl<T, U: Message + Default + 'static> Future for ProtoBufBody<T, U>
+    where T: HttpMessage + Stream<Item=Bytes, Error=PayloadError> + 'static
+{
+    type Item = U;
+    type Error = ProtoBufPayloadError;
+
+    fn poll(&mut self) -> Poll<U, ProtoBufPayloadError> {
+        if let Some(req) = self.req.take() {
+            if let Some(len) = req.headers().get(CONTENT_LENGTH) {
+                if let Ok(s) = len.to_str() {
+                    if let Ok(len) = s.parse::<usize>() {
+                        if len > self.limit {
+                            return Err(ProtoBufPayloadError::Overflow);
+                        }
+                    } else {
+                        return Err(ProtoBufPayloadError::Overflow);
+                    }
+                }
+            }
+            // check content-type
+            if !self.ct.is_empty() && req.content_type() != self.ct {
+                return Err(ProtoBufPayloadError::ContentType)
+            }
+
+            let limit = self.limit;
+            let fut = req.from_err()
+                .fold(BytesMut::new(), move |mut body, chunk| {
+                    if (body.len() + chunk.len()) > limit {
+                        Err(ProtoBufPayloadError::Overflow)
+                    } else {
+                        body.extend_from_slice(&chunk);
+                        Ok(body)
+                    }
+                })
+                .and_then(|body| Ok(<U>::decode(&mut body.into_buf())?));
+            self.fut = Some(Box::new(fut));
+        }
+
+        self.fut.as_mut().expect("ProtoBufBody could not be used second time").poll()
+    }
+}