105 lines
3.7 KiB
C++
105 lines
3.7 KiB
C++
/**
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*
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* HttpStreamScanner.cpp: Scannes HttpClient stream for lines. Supports chunking.
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*
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* MIT License
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*
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* Copyright (c) 2020 InfluxData
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include "HttpStreamScanner.h"
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// Uncomment bellow in case of a problem and rebuild sketch
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//#define INFLUXDB_CLIENT_DEBUG_ENABLE
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#include "util/debug.h"
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#include "util/helpers.h"
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HttpStreamScanner::HttpStreamScanner(HTTPClient *client, bool chunked)
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{
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_client = client;
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_stream = client->getStreamPtr();
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_chunked = chunked;
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_chunkHeader = chunked;
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_len = client->getSize();
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INFLUXDB_CLIENT_DEBUG("[D] HttpStreamScanner: chunked: %s, size: %d\n", bool2string(_chunked), _len);
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}
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bool HttpStreamScanner::next() {
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while(_client->connected() && (_len > 0 || _len == -1)) {
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_line = _stream->readStringUntil('\n');
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INFLUXDB_CLIENT_DEBUG("[D] HttpStreamScanner: line: %s\n", _line.c_str());
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++_linesNum;
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int lineLen = _line.length();
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if(lineLen == 0) {
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_error = HTTPC_ERROR_READ_TIMEOUT;
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return false;
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}
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int r = lineLen +1; //+1 for terminating \n
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_line.trim(); //remove \r
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if(!_chunked || !_chunkHeader) {
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_read += r;
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if(_lastChunkLine.length() > 0) { //fix broken line
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_line = _lastChunkLine + _line;
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_lastChunkLine = "";
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}
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}
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if(_chunkHeader && r == 2) { //empty line at the end of chunk
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//last line was complete so return
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_line = _lastChunkLine;
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_lastChunkLine = "";
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return true;
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}
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if(_chunkHeader){
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_chunkLen = (int) strtol((const char *) _line.c_str(), NULL, 16);
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INFLUXDB_CLIENT_DEBUG("[D] HttpStreamScanner chunk len: %d\n", _chunkLen);
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_chunkHeader = false;
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_read = 0;
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if(_chunkLen == 0) { //last chunk
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_error = 0;
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_line = "";
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return false;
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} else {
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continue;
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}
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} else if(_chunked && _read >= _chunkLen){ //we reached end of chunk.
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_lastChunkLine = _line;
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_chunkHeader = true;
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continue;
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}
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if(_len > 0) {
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_len -= r;
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INFLUXDB_CLIENT_DEBUG("[D] HttpStreamScanner new len: %d\n", _len);
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}
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return true;
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}
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if(!_client->connected() && ( (_chunked && _chunkLen > 0) || (!_chunked && _len > 0))) { //report error only if we didn't went to
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_error = HTTPC_ERROR_CONNECTION_LOST;
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INFLUXDB_CLIENT_DEBUG("HttpStreamScanner connection lost\n");
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}
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return false;
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}
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void HttpStreamScanner::close() {
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_client->end();
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}
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