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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "http_client.h"
#include "hex_number.h"
#include <vbench/core/line_reader.h>
#include <vespa/vespalib/data/output_writer.h>
namespace vbench {
using OutputWriter = vespalib::OutputWriter;
HttpClient::~HttpClient() {}
void
HttpClient::writeRequest() {
OutputWriter dst(_conn->stream(), WRITE_SIZE);
dst.printf("GET %s HTTP/1.1\r\n", _url.c_str());
dst.printf("Host: %s\r\n", _conn->server().host.c_str());
dst.write("User-Agent: vbench\r\n");
dst.write("X-Yahoo-Vespa-Benchmarkdata: true\r\n");
dst.write("X-Yahoo-Vespa-Benchmarkdata-Coverage: true\r\n");
dst.write("\r\n");
}
bool
HttpClient::readStatus()
{
LineReader reader(_conn->stream());
if (reader.readLine(_line) && (splitstr(_line, "\t ", _split) >= 2)) {
if (_split[0] == "HTTP/1.0") {
_header.version = 0;
} else if (_split[0] == "HTTP/1.1") {
_header.version = 1;
} else {
_handler.handleFailure(strfmt("unknown HTTP version: '%s'", _split[0].c_str()));
return false;
}
_header.status = atoi(_split[1].c_str());
if (_header.status != 200) {
_handler.handleFailure(strfmt("HTTP status not 200: '%s'", _split[1].c_str()));
return false;
}
return true;
}
if (_conn->stream().tainted()) {
_handler.handleFailure(strfmt("Connection error: %s",
_conn->stream().tainted().reason().c_str()));
} else {
_handler.handleFailure(strfmt("could not parse HTTP status line: '%s'", _line.c_str()));
}
return false;
}
bool
HttpClient::readHeaders()
{
LineReader reader(_conn->stream());
while (reader.readLine(_line)) {
if (_line.empty()) {
return true;
}
if ((_line[0] == ' ') || (_line[0] == '\t')) {
// ignore continuation headers
} else if (_line.find("X-Yahoo-Vespa-") == 0) {
if (splitstr(_line, ":\t ", _split) == 2) {
_handler.handleHeader(_split[0], _split[1]);
}
} else {
if (splitstr(_line, ":\t ", _split) > 1) {
if (strcasecmp(_split[0].c_str(), "connection") == 0) {
for (size_t i = 1; i < _split.size(); ++i) {
if (strcasecmp(_split[i].c_str(), "keep-alive") == 0) {
_handler.handleHeader(_split[0], _split[i]);
_header.keepAliveGiven = true;
} else if (strcasecmp(_split[i].c_str(), "close") == 0) {
_handler.handleHeader(_split[0], _split[i]);
_header.connectionCloseGiven = true;
}
}
} else if (strcasecmp(_split[0].c_str(), "content-length") == 0 &&
_split.size() == 2)
{
_handler.handleHeader(_split[0], _split[1]);
_header.contentLengthGiven = true;
_header.contentLength = atoi(_split[1].c_str());
} else if (strcasecmp(_split[0].c_str(), "transfer-encoding") == 0 &&
strcasecmp(_split[1].c_str(), "chunked") == 0)
{
_handler.handleHeader(_split[0], _split[1]);
_header.chunkedEncodingGiven = true;
}
}
}
}
_handler.handleFailure("HTTP header did not end in empty line");
return false;
}
bool
HttpClient::readContent(size_t len) {
Input &input = _conn->stream();
while (len > 0) {
Memory mem = input.obtain();
mem.size = std::min(len, mem.size);
if (mem.size == 0) {
_handler.handleFailure(strfmt("short read: missing %zu bytes", len));
return false;
}
_handler.handleContent(mem);
input.evict(mem.size);
len -= mem.size;
}
return true;
}
bool
HttpClient::readChunkSize(bool first, size_t &size)
{
LineReader reader(_conn->stream());
if (!first && (!reader.readLine(_line) || !_line.empty())) {
return false;
}
if (!reader.readLine(_line)) {
return false;
}
HexNumber hex(_line.c_str());
size = hex.value();
return (hex.length() > 0);
}
bool
HttpClient::skipTrailers()
{
LineReader reader(_conn->stream());
while (reader.readLine(_line)) {
if (_line.empty()) {
return true;
}
}
return false;
}
bool
HttpClient::readContent()
{
if (_header.contentLengthGiven) {
return readContent(_header.contentLength);
} else if (_header.chunkedEncodingGiven) {
size_t chunkSize = 0;
for (bool first = true; readChunkSize(first, chunkSize); first = false) {
if (chunkSize == 0) {
return skipTrailers();
}
if (!readContent(chunkSize)) {
return false;
}
}
_handler.handleFailure("error reading HTTP chunk size");
return false;
} else { // data terminated by eof
if (serverKeepAlive()) {
_handler.handleFailure("server indicated keep-alive, "
"but we need eof to terminate data");
return false;
}
Input &input = _conn->stream();
for (;;) {
Memory mem = input.obtain();
if (mem.size == 0) {
if (_conn->stream().tainted()) {
_handler.handleFailure(strfmt("read error: '%s'",
_conn->stream().tainted().reason().c_str()));
}
return true;
}
_handler.handleContent(mem);
input.evict(mem.size);
}
}
}
bool
HttpClient::perform(CryptoEngine &crypto)
{
writeRequest();
if (!_conn->fresh() && (_conn->stream().obtain().size == 0)) {
_conn.reset(new HttpConnection(crypto, _conn->server()));
writeRequest();
}
return (readStatus() && readHeaders() && readContent());
}
} // namespace vbench
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