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// 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.
#include "net/tools/quic/quic_in_memory_cache.h"
#include "base/files/file_enumerator.h"
#include "base/files/file_util.h"
#include "base/stl_util.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "net/http/http_response_headers.h"
#include "net/http/http_util.h"
#include "net/spdy/spdy_http_utils.h"
using base::FilePath;
using base::IntToString;
using base::StringPiece;
using std::string;
namespace net {
namespace tools {
QuicInMemoryCache::Response::Response() : response_type_(REGULAR_RESPONSE) {}
QuicInMemoryCache::Response::~Response() {}
// static
QuicInMemoryCache* QuicInMemoryCache::GetInstance() {
return Singleton<QuicInMemoryCache>::get();
}
const QuicInMemoryCache::Response* QuicInMemoryCache::GetResponse(
StringPiece host,
StringPiece path) const {
ResponseMap::const_iterator it = responses_.find(GetKey(host, path));
if (it == responses_.end()) {
return nullptr;
}
return it->second;
}
void QuicInMemoryCache::AddSimpleResponse(StringPiece host,
StringPiece path,
int response_code,
StringPiece response_detail,
StringPiece body) {
SpdyHeaderBlock response_headers;
response_headers[":version"] = "HTTP/1.1";
string status = IntToString(response_code) + " ";
response_detail.AppendToString(&status);
response_headers[":status"] = status;
response_headers["content-length"] =
IntToString(static_cast<int>(body.length()));
AddResponse(host, path, response_headers, body);
}
void QuicInMemoryCache::AddResponse(StringPiece host,
StringPiece path,
const SpdyHeaderBlock& response_headers,
StringPiece response_body) {
AddResponseImpl(host, path, REGULAR_RESPONSE, response_headers,
response_body);
}
void QuicInMemoryCache::AddSpecialResponse(StringPiece host,
StringPiece path,
SpecialResponseType response_type) {
AddResponseImpl(host, path, response_type, SpdyHeaderBlock(), "");
}
QuicInMemoryCache::QuicInMemoryCache() {}
void QuicInMemoryCache::ResetForTests() {
STLDeleteValues(&responses_);
}
void QuicInMemoryCache::InitializeFromDirectory(const string& cache_directory) {
if (cache_directory.empty()) {
LOG(DFATAL) << "cache_directory must not be empty.";
return;
}
VLOG(1) << "Attempting to initialize QuicInMemoryCache from directory: "
<< cache_directory;
FilePath directory(FilePath::FromUTF8Unsafe(cache_directory));
base::FileEnumerator file_list(directory,
true,
base::FileEnumerator::FILES);
for (FilePath file_iter = file_list.Next(); !file_iter.empty();
file_iter = file_list.Next()) {
// Need to skip files in .svn directories
if (file_iter.value().find(FILE_PATH_LITERAL("/.svn/")) != string::npos) {
continue;
}
// Tease apart filename into host and path.
string file = file_iter.AsUTF8Unsafe();
file.erase(0, cache_directory.length());
if (file[0] == '/') {
file.erase(0, 1);
}
string file_contents;
base::ReadFileToString(file_iter, &file_contents);
int file_len = static_cast<int>(file_contents.length());
int headers_end = HttpUtil::LocateEndOfHeaders(file_contents.data(),
file_len);
if (headers_end < 1) {
LOG(DFATAL) << "Headers invalid or empty, ignoring: " << file;
continue;
}
string raw_headers =
HttpUtil::AssembleRawHeaders(file_contents.data(), headers_end);
scoped_refptr<HttpResponseHeaders> response_headers =
new HttpResponseHeaders(raw_headers);
string base;
if (response_headers->GetNormalizedHeader("X-Original-Url", &base)) {
response_headers->RemoveHeader("X-Original-Url");
// Remove the protocol so we can add it below.
if (StartsWithASCII(base, "https://", false)) {
base = base.substr(8);
} else if (StartsWithASCII(base, "http://", false)) {
base = base.substr(7);
}
} else {
base = file;
}
size_t path_start = base.find_first_of('/');
StringPiece host(StringPiece(base).substr(0, path_start));
StringPiece path(StringPiece(base).substr(path_start));
if (path[path.length() - 1] == ',') {
path.remove_suffix(1);
}
StringPiece body(file_contents.data() + headers_end,
file_contents.size() - headers_end);
// QUIC_VERSION_24 and below use SPDY/3 headers, which includes the
// status reason in :status, and "HTTP/1.1" in :version. Since this
// format is a strict superset of SPDY/4 headers, the cache uses this
// format to store response. Once SPDY/3 responses are no longer
// required, the cache can store SPDY/4 headers.
SpdyHeaderBlock header_block;
CreateSpdyHeadersFromHttpResponse(*response_headers, SPDY3, &header_block);
AddResponse(host, path, header_block, body);
}
}
QuicInMemoryCache::~QuicInMemoryCache() {
STLDeleteValues(&responses_);
}
void QuicInMemoryCache::AddResponseImpl(
StringPiece host,
StringPiece path,
SpecialResponseType response_type,
const SpdyHeaderBlock& response_headers,
StringPiece response_body) {
string key = GetKey(host, path);
VLOG(1) << "Adding response for: " << key;
if (ContainsKey(responses_, key)) {
LOG(DFATAL) << "Response for '" << key << "' already exists!";
return;
}
Response* new_response = new Response();
new_response->set_response_type(response_type);
new_response->set_headers(response_headers);
new_response->set_body(response_body);
responses_[key] = new_response;
}
string QuicInMemoryCache::GetKey(StringPiece host, StringPiece path) const {
return host.as_string() + path.as_string();
}
} // namespace tools
} // namespace net
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