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
--- /dev/null
+++ 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