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+/*
+ * Copyright (c) 2014, Peter Thorson. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * * Neither the name of the WebSocket++ Project nor the
+ * names of its contributors may be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL PETER THORSON BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef HTTP_PARSER_RESPONSE_IMPL_HPP
+#define HTTP_PARSER_RESPONSE_IMPL_HPP
+
+#include <algorithm>
+#include <istream>
+#include <sstream>
+#include <string>
+
+#include <websocketpp/http/parser.hpp>
+
+namespace websocketpp {
+namespace http {
+namespace parser {
+
+inline size_t response::consume(char const * buf, size_t len) {
+ if (m_state == DONE) {return 0;}
+
+ if (m_state == BODY) {
+ return this->process_body(buf,len);
+ }
+
+ // copy new header bytes into buffer
+ m_buf->append(buf,len);
+
+ // Search for delimiter in buf. If found read until then. If not read all
+ std::string::iterator begin = m_buf->begin();
+ std::string::iterator end = begin;
+
+
+ for (;;) {
+ // search for delimiter
+ end = std::search(
+ begin,
+ m_buf->end(),
+ header_delimiter,
+ header_delimiter + sizeof(header_delimiter) - 1
+ );
+
+ m_header_bytes += (end-begin+sizeof(header_delimiter));
+
+ if (m_header_bytes > max_header_size) {
+ // exceeded max header size
+ throw exception("Maximum header size exceeded.",
+ status_code::request_header_fields_too_large);
+ }
+
+ if (end == m_buf->end()) {
+ // we are out of bytes. Discard the processed bytes and copy the
+ // remaining unprecessed bytes to the beginning of the buffer
+ std::copy(begin,end,m_buf->begin());
+ m_buf->resize(static_cast<std::string::size_type>(end-begin));
+
+ m_read += len;
+ m_header_bytes -= m_buf->size();
+
+ return len;
+ }
+
+ //the range [begin,end) now represents a line to be processed.
+
+ if (end-begin == 0) {
+ // we got a blank line
+ if (m_state == RESPONSE_LINE) {
+ throw exception("Incomplete Request",status_code::bad_request);
+ }
+
+ // TODO: grab content-length
+ std::string length = get_header("Content-Length");
+
+ if (length.empty()) {
+ // no content length found, read indefinitely
+ m_read = 0;
+ } else {
+ std::istringstream ss(length);
+
+ if ((ss >> m_read).fail()) {
+ throw exception("Unable to parse Content-Length header",
+ status_code::bad_request);
+ }
+ }
+
+ m_state = BODY;
+
+ // calc header bytes processed (starting bytes - bytes left)
+ size_t read = (
+ len - static_cast<std::string::size_type>(m_buf->end() - end)
+ + sizeof(header_delimiter) - 1
+ );
+
+ // if there were bytes left process them as body bytes
+ if (read < len) {
+ read += this->process_body(buf+read,(len-read));
+ }
+
+ // frees memory used temporarily during header parsing
+ m_buf.reset();
+
+ return read;
+ } else {
+ if (m_state == RESPONSE_LINE) {
+ this->process(begin,end);
+ m_state = HEADERS;
+ } else {
+ this->process_header(begin,end);
+ }
+ }
+
+ begin = end+(sizeof(header_delimiter) - 1);
+ }
+}
+
+inline size_t response::consume(std::istream & s) {
+ char buf[istream_buffer];
+ size_t bytes_read;
+ size_t bytes_processed;
+ size_t total = 0;
+
+ while (s.good()) {
+ s.getline(buf,istream_buffer);
+ bytes_read = static_cast<size_t>(s.gcount());
+
+ if (s.fail() || s.eof()) {
+ bytes_processed = this->consume(buf,bytes_read);
+ total += bytes_processed;
+
+ if (bytes_processed != bytes_read) {
+ // problem
+ break;
+ }
+ } else if (s.bad()) {
+ // problem
+ break;
+ } else {
+ // the delimiting newline was found. Replace the trailing null with
+ // the newline that was discarded, since our raw consume function
+ // expects the newline to be be there.
+ buf[bytes_read-1] = '\n';
+ bytes_processed = this->consume(buf,bytes_read);
+ total += bytes_processed;
+
+ if (bytes_processed != bytes_read) {
+ // problem
+ break;
+ }
+ }
+ }
+
+ return total;
+}
+
+inline std::string response::raw() const {
+ // TODO: validation. Make sure all required fields have been set?
+
+ std::stringstream ret;
+
+ ret << get_version() << " " << m_status_code << " " << m_status_msg;
+ ret << "\r\n" << raw_headers() << "\r\n";
+
+ ret << m_body;
+
+ return ret.str();
+}
+
+inline void response::set_status(status_code::value code) {
+ // TODO: validation?
+ m_status_code = code;
+ m_status_msg = get_string(code);
+}
+
+inline void response::set_status(status_code::value code, std::string const &
+ msg)
+{
+ // TODO: validation?
+ m_status_code = code;
+ m_status_msg = msg;
+}
+
+inline void response::process(std::string::iterator begin,
+ std::string::iterator end)
+{
+ std::string::iterator cursor_start = begin;
+ std::string::iterator cursor_end = std::find(begin,end,' ');
+
+ if (cursor_end == end) {
+ throw exception("Invalid response line",status_code::bad_request);
+ }
+
+ set_version(std::string(cursor_start,cursor_end));
+
+ cursor_start = cursor_end+1;
+ cursor_end = std::find(cursor_start,end,' ');
+
+ if (cursor_end == end) {
+ throw exception("Invalid request line",status_code::bad_request);
+ }
+
+ int code;
+
+ std::istringstream ss(std::string(cursor_start,cursor_end));
+
+ if ((ss >> code).fail()) {
+ throw exception("Unable to parse response code",status_code::bad_request);
+ }
+
+ set_status(status_code::value(code),std::string(cursor_end+1,end));
+}
+
+inline size_t response::process_body(char const * buf, size_t len) {
+ // If no content length was set then we read forever and never set m_ready
+ if (m_read == 0) {
+ //m_body.append(buf,len);
+ //return len;
+ m_state = DONE;
+ return 0;
+ }
+
+ // Otherwise m_read is the number of bytes left.
+ size_t to_read;
+
+ if (len >= m_read) {
+ // if we have more bytes than we need read, read only the amount needed
+ // then set done state
+ to_read = m_read;
+ m_state = DONE;
+ } else {
+ // we need more bytes than are available, read them all
+ to_read = len;
+ }
+
+ m_body.append(buf,to_read);
+ m_read -= to_read;
+ return to_read;
+}
+
+} // namespace parser
+} // namespace http
+} // namespace websocketpp
+
+#endif // HTTP_PARSER_RESPONSE_IMPL_HPP