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// Copyright (c) 2010 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/http/http_request_headers.h"
#include "base/logging.h"
#include "base/string_split.h"
#include "base/string_util.h"
#include "net/http/http_util.h"
namespace net {
const char HttpRequestHeaders::kGetMethod[] = "GET";
const char HttpRequestHeaders::kAcceptCharset[] = "Accept-Charset";
const char HttpRequestHeaders::kAcceptEncoding[] = "Accept-Encoding";
const char HttpRequestHeaders::kAcceptLanguage[] = "Accept-Language";
const char HttpRequestHeaders::kCacheControl[] = "Cache-Control";
const char HttpRequestHeaders::kConnection[] = "Connection";
const char HttpRequestHeaders::kContentLength[] = "Content-Length";
const char HttpRequestHeaders::kContentType[] = "Content-Type";
const char HttpRequestHeaders::kCookie[] = "Cookie";
const char HttpRequestHeaders::kHost[] = "Host";
const char HttpRequestHeaders::kIfModifiedSince[] = "If-Modified-Since";
const char HttpRequestHeaders::kIfNoneMatch[] = "If-None-Match";
const char HttpRequestHeaders::kIfRange[] = "If-Range";
const char HttpRequestHeaders::kOrigin[] = "Origin";
const char HttpRequestHeaders::kPragma[] = "Pragma";
const char HttpRequestHeaders::kProxyConnection[] = "Proxy-Connection";
const char HttpRequestHeaders::kRange[] = "Range";
const char HttpRequestHeaders::kReferer[] = "Referer";
const char HttpRequestHeaders::kUserAgent[] = "User-Agent";
const char HttpRequestHeaders::kTransferEncoding[] = "Transfer-Encoding";
HttpRequestHeaders::HeaderKeyValuePair::HeaderKeyValuePair() {
}
HttpRequestHeaders::HeaderKeyValuePair::HeaderKeyValuePair(
const base::StringPiece& key, const base::StringPiece& value)
: key(key.data(), key.size()), value(value.data(), value.size()) {
}
HttpRequestHeaders::Iterator::Iterator(const HttpRequestHeaders& headers)
: started_(false),
curr_(headers.headers_.begin()),
end_(headers.headers_.end()) {}
HttpRequestHeaders::Iterator::~Iterator() {}
bool HttpRequestHeaders::Iterator::GetNext() {
if (!started_) {
started_ = true;
return curr_ != end_;
}
if (curr_ == end_)
return false;
++curr_;
return curr_ != end_;
}
HttpRequestHeaders::HttpRequestHeaders() {}
HttpRequestHeaders::~HttpRequestHeaders() {}
bool HttpRequestHeaders::GetHeader(const base::StringPiece& key,
std::string* out) const {
HeaderVector::const_iterator it = FindHeader(key);
if (it == headers_.end())
return false;
out->assign(it->value);
return true;
}
void HttpRequestHeaders::Clear() {
headers_.clear();
}
void HttpRequestHeaders::SetHeader(const base::StringPiece& key,
const base::StringPiece& value) {
HeaderVector::iterator it = FindHeader(key);
if (it != headers_.end())
it->value = value.as_string();
else
headers_.push_back(HeaderKeyValuePair(key.as_string(), value.as_string()));
}
void HttpRequestHeaders::SetHeaderIfMissing(const base::StringPiece& key,
const base::StringPiece& value) {
HeaderVector::iterator it = FindHeader(key);
if (it == headers_.end())
headers_.push_back(HeaderKeyValuePair(key.as_string(), value.as_string()));
}
void HttpRequestHeaders::RemoveHeader(const base::StringPiece& key) {
HeaderVector::iterator it = FindHeader(key);
if (it != headers_.end())
headers_.erase(it);
}
void HttpRequestHeaders::AddHeaderFromString(
const base::StringPiece& header_line) {
DCHECK_EQ(std::string::npos, header_line.find("\r\n"))
<< "\"" << header_line << "\" contains CRLF.";
const std::string::size_type key_end_index = header_line.find(":");
if (key_end_index == std::string::npos) {
LOG(DFATAL) << "\"" << header_line << "\" is missing colon delimiter.";
return;
}
if (key_end_index == 0) {
LOG(DFATAL) << "\"" << header_line << "\" is missing header key.";
return;
}
const base::StringPiece header_key(header_line.data(), key_end_index);
const std::string::size_type value_index = key_end_index + 1;
if (value_index < header_line.size()) {
std::string header_value(header_line.data() + value_index,
header_line.size() - value_index);
std::string::const_iterator header_value_begin =
header_value.begin();
std::string::const_iterator header_value_end =
header_value.end();
HttpUtil::TrimLWS(&header_value_begin, &header_value_end);
if (header_value_begin == header_value_end) {
// Value was all LWS.
SetHeader(header_key, "");
} else {
SetHeader(header_key,
base::StringPiece(&*header_value_begin,
header_value_end - header_value_begin));
}
} else if (value_index == header_line.size()) {
SetHeader(header_key, "");
} else {
NOTREACHED();
}
}
void HttpRequestHeaders::AddHeadersFromString(
const base::StringPiece& headers) {
// TODO(willchan): Consider adding more StringPiece support in string_util.h
// to eliminate copies.
std::vector<std::string> header_line_vector;
base::SplitStringUsingSubstr(headers.as_string(), "\r\n",
&header_line_vector);
for (std::vector<std::string>::const_iterator it = header_line_vector.begin();
it != header_line_vector.end(); ++it) {
if (!it->empty())
AddHeaderFromString(*it);
}
}
void HttpRequestHeaders::MergeFrom(const HttpRequestHeaders& other) {
for (HeaderVector::const_iterator it = other.headers_.begin();
it != other.headers_.end(); ++it ) {
SetHeader(it->key, it->value);
}
}
std::string HttpRequestHeaders::ToString() const {
std::string output;
for (HeaderVector::const_iterator it = headers_.begin();
it != headers_.end(); ++it) {
if (!it->value.empty()) {
base::StringAppendF(&output, "%s: %s\r\n",
it->key.c_str(), it->value.c_str());
} else {
base::StringAppendF(&output, "%s:\r\n", it->key.c_str());
}
}
output.append("\r\n");
return output;
}
HttpRequestHeaders::HeaderVector::iterator
HttpRequestHeaders::FindHeader(const base::StringPiece& key) {
for (HeaderVector::iterator it = headers_.begin();
it != headers_.end(); ++it) {
if (key.length() == it->key.length() &&
!base::strncasecmp(key.data(), it->key.data(), key.length()))
return it;
}
return headers_.end();
}
HttpRequestHeaders::HeaderVector::const_iterator
HttpRequestHeaders::FindHeader(const base::StringPiece& key) const {
for (HeaderVector::const_iterator it = headers_.begin();
it != headers_.end(); ++it) {
if (key.length() == it->key.length() &&
!base::strncasecmp(key.data(), it->key.data(), key.length()))
return it;
}
return headers_.end();
}
} // namespace net
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