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// Copyright (c) 2009 The Chromium Authors. All rights reserved. Use of this
// source code is governed by a BSD-style license that can be found in the
// LICENSE file.
#include "net/ftp/ftp_ctrl_response_buffer.h"
#include "base/logging.h"
#include "base/string_util.h"
#include "net/base/net_errors.h"
namespace net {
// static
const int FtpCtrlResponse::kInvalidStatusCode = -1;
int FtpCtrlResponseBuffer::ConsumeData(const char* data, int data_length) {
buffer_.append(data, data_length);
ExtractFullLinesFromBuffer();
while (!lines_.empty()) {
ParsedLine line = lines_.front();
lines_.pop();
if (multiline_) {
if (!line.is_complete || line.status_code != response_buf_.status_code) {
line_buf_.append(line.raw_text);
continue;
}
response_buf_.lines.push_back(line_buf_);
line_buf_ = line.status_text;
DCHECK_EQ(line.status_code, response_buf_.status_code);
if (!line.is_multiline) {
response_buf_.lines.push_back(line_buf_);
responses_.push(response_buf_);
// Prepare to handle following lines.
response_buf_ = FtpCtrlResponse();
line_buf_.clear();
multiline_ = false;
}
} else {
if (!line.is_complete)
return ERR_INVALID_RESPONSE;
response_buf_.status_code = line.status_code;
if (line.is_multiline) {
line_buf_ = line.status_text;
multiline_ = true;
} else {
response_buf_.lines.push_back(line.status_text);
responses_.push(response_buf_);
// Prepare to handle following lines.
response_buf_ = FtpCtrlResponse();
line_buf_.clear();
}
}
}
return OK;
}
// static
FtpCtrlResponseBuffer::ParsedLine FtpCtrlResponseBuffer::ParseLine(
const std::string& line) {
ParsedLine result;
if (line.length() >= 3) {
if (StringToInt(line.substr(0, 3), &result.status_code))
result.has_status_code = (100 <= result.status_code &&
result.status_code <= 599);
if (result.has_status_code && line.length() >= 4 && line[3] == ' ') {
result.is_complete = true;
} else if (result.has_status_code && line.length() >= 4 && line[3] == '-') {
result.is_complete = true;
result.is_multiline = true;
}
}
if (result.is_complete) {
result.status_text = line.substr(4);
} else {
result.status_text = line;
}
result.raw_text = line;
return result;
}
void FtpCtrlResponseBuffer::ExtractFullLinesFromBuffer() {
int cut_pos = 0;
for (size_t i = 0; i < buffer_.length(); i++) {
if (i >= 1 && buffer_[i - 1] == '\r' && buffer_[i] == '\n') {
lines_.push(ParseLine(buffer_.substr(cut_pos, i - cut_pos - 1)));
cut_pos = i + 1;
}
}
buffer_.erase(0, cut_pos);
}
} // namespace net
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