HTTP server for testing Google Drive.

chrome/browser/chromeos/drive/test_servers/http_request.h

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef CHROME_BROWSER_CHROMEOS_DRIVE_TEST_SERVERS_HTTP_REQUEST_H_
+#define CHROME_BROWSER_CHROMEOS_DRIVE_TEST_SERVERS_HTTP_REQUEST_H_
+
+#include <map>
+#include <string>
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/string_piece.h"
+#include "googleurl/src/gurl.h"
+
+namespace drive {
+namespace test_servers {
+
+using base::StringPiece;
+
+enum HttpMethod {
+  UNKNOWN,
+  GET,
+  HEAD,
+  POST,
+  PUT,
+  DELETE,
+};
+
+// Wraps the HTTP request. Since it can be big, use scoped_ptr to pass it

[satorux1, 2012/11/12 06:07:00]

Wraps -> Represents ?

[mtomasz, 2012/11/12 12:17:44]

Done.

+// instead of copying.
+struct HttpRequest {
+  HttpRequest();
+  ~HttpRequest();
+
+  GURL uri;
+  HttpMethod method;
+  std::map<std::string, std::string> headers;
+  std::string content;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(HttpRequest);
+};
+
+// Parses the input data and produces valid HttpRequest objects. The common
+// use is as below:
+// HttpRequestParser parser;
+// (...)
+// void OnDataChunkReceived(Socket* socket, const char* data, int size) {
+//   parser.ProcessChunk(data, size);
+//   while (parser.ParseRequest() == HttpRequestParser::ACCEPTED) {
+//     scoped_ptr<HttpRequest> request = parser.GetRequest();
+//     (... process the request ...)
+//   }
+class HttpRequestParser {

[satorux1, 2012/11/12 06:07:00]

I think we can write a unit test for this class.

[mtomasz, 2012/11/12 12:17:44]

It is already done. I've extracted it to a separate file. Please take a look at
http_request_unittest.cc. Done.

+ public:
+  // Parsing result.
+  enum ParseResult {
+    WAITING,  // A request is not completed yet, waiting for more data.
+    ACCEPTED,  // A request has been parsed and it is ready to be processed.
+  };
+
+  // Parser state.
+  enum State {
+    STATE_HEADERS,  // Waiting for a request headers.
+    STATE_CONTENT,  // Waiting for content data.
+    STATE_ACCEPTED,  // Request has been parsed.
+  };
+
+  HttpRequestParser();
+  virtual ~HttpRequestParser();
+
+  // Adds chunk of data into the internal buffer.
+  virtual void ProcessChunk(const char *data, size_t length);

[satorux1, 2012/11/12 06:07:00]

Can we use StringPiece instead? One less parameter would be good.

[mtomasz, 2012/11/12 12:17:44]

How about std::string? Done. Please let me know what do you think.

[satorux1, 2012/11/13 05:13:18]

I think StringPiece is better.

[mtomasz, 2012/11/13 12:23:07]

Done.

+
+  // Parses the http request (including data - if provided).
+  // If returns ACCEPTED, then it means that the whole request has been found
+  // in the internal buffer (and parsed). After calling GetRequest(), it will be
+  // ready to parse another request.
+  virtual ParseResult ParseRequest();

[satorux1, 2012/11/12 06:07:00]

should this be virtual? Are there any classes inheriting this class?

[mtomasz, 2012/11/12 12:17:44]

Done.

+
+  // Retrieves parsed request. Can be only called, when the parser is in
+  // STATE_ACCEPTED state. After calling it, the parser is ready to parse
+  // another request.
+  scoped_ptr<HttpRequest> GetRequest();
+
+ private:
+  std::string buffer_;
+  scoped_ptr<HttpRequest> http_request_;
+  State state_;
+  size_t buffer_position_;  // Current position in the internal buffer.
+  size_t current_content_length_;

[satorux1, 2012/11/12 06:07:00]

This is the content length declared in the Content-Length: header, right? Then,
"declared_content_length" may be a better name?

[mtomasz, 2012/11/12 12:17:44]

Right! Done. Also, added a comment.

+
+  virtual HttpMethod GetMethodType(const std::string& token) const;
+
+  // Parses headers and returns ACCEPTED if whole request was parsed. Otherwise
+  // returns WAITING.
+  virtual ParseResult ParseHeaders();
+
+  // Parses request's content data and returns ACCEPTED if all of it have been
+  // processed. Chunked Transfer Encoding *is not* supported.
+  virtual ParseResult ParseContent();
+
+  std::string ShiftLine();

[satorux1, 2012/11/12 06:07:00]

Function comment is missing. Does the returned string includes CRLF? When it
returns an empty string? Please document.

[mtomasz, 2012/11/12 12:17:44]

Done.

+};
+
+}  // namespace test_servers
+}  // namespace drive
+
+#endif  // CHROME_BROWSER_CHROMEOS_DRIVE_TEST_SERVERS_HTTP_REQUEST_H_