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-rw-r--r--libtransport/src/http/response.cc138
1 files changed, 138 insertions, 0 deletions
diff --git a/libtransport/src/http/response.cc b/libtransport/src/http/response.cc
new file mode 100644
index 000000000..ba0acd1ac
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+++ b/libtransport/src/http/response.cc
@@ -0,0 +1,138 @@
+/*
+ * 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 <experimental/algorithm>
+#include <experimental/functional>
+
+#include <cstring>
+
+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;
+ auto it =
+ std::experimental::search(begin, end,
+ std::experimental::make_boyer_moore_searcher(
+ crlf2, crlf2 + strlen(crlf2)));
+
+ if (it != end) {
+ std::stringstream ss;
+ ss.str(std::string(begin, it));
+
+ 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;
+ }
+
+ std::string _status_string;
+
+ line_s >> status_code;
+ line_s >> _status_string;
+
+ auto _it = std::search(line.begin(), line.end(), status_string.begin(),
+ status_string.end());
+
+ status_string = std::string(_it, line.end() - 1);
+
+ 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()) {
+ headers[line.substr(0, param_end)] =
+ 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 \ No newline at end of file