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/*
* Copyright (c) 2017-2020 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <hicn/transport/errors/errors.h>
#include <hicn/transport/http/response.h>
#include <algorithm>
#include <cstring>
#include <functional>
namespace transport {
namespace http {
HTTPResponse::HTTPResponse() {}
HTTPResponse::HTTPResponse(std::unique_ptr<utils::MemBuf> &&response) {
parse(std::move(response));
}
void HTTPResponse::appendResponseChunk(
std::unique_ptr<utils::MemBuf> &&response_chunk) {
if (headers_.empty()) {
parse(std::move(response_chunk));
} else {
payload_->prependChain(std::move(response_chunk));
}
}
bool HTTPResponse::parseHeaders(std::unique_ptr<utils::MemBuf> &&buffer) {
auto ret =
HTTPResponse::parseHeaders(buffer->data(), buffer->length(), headers_,
http_version_, status_code_, status_string_);
if (ret) {
buffer->trimStart(ret);
payload_ = std::move(buffer);
return true;
}
return false;
}
std::size_t HTTPResponse::parseHeaders(const uint8_t *buffer, std::size_t size,
HTTPHeaders &headers,
std::string &http_version,
std::string &status_code,
std::string &status_string) {
const char *crlf2 = "\r\n\r\n";
const char *begin = (const char *)buffer;
const char *end = begin + size;
const char *begincrlf2 = (const char *)crlf2;
const char *endcrlf2 = begincrlf2 + strlen(crlf2);
auto it = std::search(begin, end, begincrlf2, endcrlf2);
if (it != end) {
std::stringstream ss;
ss.str(std::string(begin, it + 2));
std::string line;
getline(ss, line);
std::istringstream line_s(line);
std::string _http_version;
line_s >> _http_version;
std::size_t separator;
if ((separator = _http_version.find('/')) != std::string::npos) {
if (_http_version.substr(0, separator) != "HTTP") {
return 0;
}
http_version =
line.substr(separator + 1, _http_version.length() - separator - 1);
} else {
return 0;
}
line_s >> status_code;
line_s >> status_string;
std::size_t param_end;
std::size_t value_start;
while (getline(ss, line)) {
if ((param_end = line.find(':')) != std::string::npos) {
value_start = param_end + 1;
if ((value_start) < line.size()) {
if (line[value_start] == ' ') {
value_start++;
}
if (value_start < line.size()) {
auto header = line.substr(0, param_end);
std::transform(header.begin(), header.end(), header.begin(),
[](unsigned char c) { return std::tolower(c); });
headers[header] =
line.substr(value_start, line.size() - value_start - 1);
}
}
} else {
return 0;
}
}
}
return it + strlen(crlf2) - begin;
}
void HTTPResponse::parse(std::unique_ptr<utils::MemBuf> &&response) {
if (!parseHeaders(std::move(response))) {
throw errors::RuntimeException("Malformed HTTP response");
}
}
const std::string &HTTPResponse::getStatusCode() const { return status_code_; }
const std::string &HTTPResponse::getStatusString() const {
return status_string_;
}
} // namespace http
} // namespace transport
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