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#include "codes.h"
#include "parse.h"
#include <library/cpp/charset/codepage.h>
#include <library/cpp/http/io/stream.h>
#include <library/cpp/mime/types/mime.h>
#include <library/cpp/uri/uri.h>
#include <library/cpp/string_utils/url/url.h>
#include <util/string/vector.h>
namespace NHttpFetcher {
namespace {
static TString MimeTypeFromUrl(const NUri::TUri& httpUrl) {
TStringBuf path = httpUrl.GetField(NUri::TField::FieldPath);
size_t pos = path.find_last_of('.');
if (pos == TStringBuf::npos) {
return "";
}
// TODO (stanly) replace TString with TStringBuf
TString ext = TString(path.substr(pos + 1));
TString mime = mimetypeByExt(path.data());
if (mime) {
return mime;
}
if (ext == "jpg" || ext == "jpeg" || ext == "png" || ext == "gif") {
return "image/" + ext;
} else if (ext == "m4v" || ext == "mp4" || ext == "flv" || ext == "mpeg") {
return "video/" + ext;
} else if (ext == "mp3" || ext == "wav" || ext == "ogg") {
return "audio/" + ext;
} else if (ext == "zip" || ext == "doc" || ext == "docx" || ext == "xls" || ext == "xlsx" || ext == "pdf" || ext == "ppt") {
return "application/" + ext;
} else if (ext == "rar" || ext == "7z") {
return "application/x-" + ext + "-compressed";
} else if (ext == "exe") {
return "application/octet-stream";
}
return "";
}
static TString MimeTypeFromUrl(const TString& url) {
static const ui64 flags = NUri::TFeature::FeaturesRobot | NUri::TFeature::FeatureToLower;
NUri::TUri httpUrl;
if (httpUrl.Parse(url, flags) != NUri::TUri::ParsedOK) {
return "";
}
return MimeTypeFromUrl(httpUrl);
}
// Extracts encoding & content-type from headers
static void ProcessHeaders(TResult& result) {
for (THttpHeaders::TConstIterator it = result.Headers.Begin(); it != result.Headers.End(); it++) {
TString name = it->Name();
name.to_lower();
if (name == "content-type") {
TString value = it->Value();
value.to_lower();
size_t delimPos = value.find(';');
if (delimPos == TString::npos) {
delimPos = value.size();
}
result.MimeType = value.substr(0, delimPos);
size_t charsetPos = value.find("charset=");
if (charsetPos == TString::npos) {
continue;
}
delimPos = value.find(';', charsetPos + 1);
TString charsetStr = value.substr(charsetPos + 8,
delimPos == TString::npos ? delimPos : delimPos - charsetPos - 8);
ECharset charset = CharsetByName(charsetStr.data());
if (charset != CODES_UNSUPPORTED && charset != CODES_UNKNOWN) {
result.Encoding = charset;
}
}
}
if (result.MimeType.empty() || result.MimeType == "application/octet-stream") {
const TString& detectedMimeType = MimeTypeFromUrl(result.ResolvedUrl);
if (detectedMimeType) {
result.MimeType = detectedMimeType;
}
}
}
}
void ParseHttpResponse(TResult& result, IInputStream& is, THttpURL::EKind kind,
TStringBuf host, ui16 port) {
THttpInput httpIn(&is);
TString firstLine = httpIn.FirstLine();
TVector<TString> params = SplitString(firstLine, " ");
try {
if (params.size() < 2) {
ythrow yexception() << "failed to parse first line";
}
result.HttpVersion = params[0];
result.Code = FromString(params[1]);
} catch (const std::exception&) {
result.Code = WRONG_HTTP_HEADER_CODE;
}
for (auto it = httpIn.Headers().Begin(); it < httpIn.Headers().End(); ++it) {
const THttpInputHeader& header = *it;
TString name = header.Name();
name.to_lower();
if (name == "location" && IsRedirectCode(result.Code)) {
// TODO (stanly) use correct routine to parse location
result.Location = header.Value();
result.ResolvedUrl = header.Value();
if (result.ResolvedUrl.StartsWith('/')) {
const bool defaultPort =
(kind == THttpURL::SchemeHTTP && port == 80) ||
(kind == THttpURL::SchemeHTTPS && port == 443);
result.ResolvedUrl = TString(NUri::SchemeKindToString(kind)) + "://" + host +
(defaultPort ? "" : ":" + ToString(port)) +
result.ResolvedUrl;
}
}
}
try {
result.Headers = httpIn.Headers();
result.Data = httpIn.ReadAll();
ProcessHeaders(result);
// TODO (stanly) try to detect mime-type by content
} catch (const yexception& /* exception */) {
result.Code = WRONG_HTTP_RESPONSE;
}
}
void ParseHttpResponse(TResult& result, IInputStream& stream, const TString& url) {
THttpURL::EKind kind;
TString host;
ui16 port;
ParseUrl(url, kind, host, port);
ParseHttpResponse(result, stream, kind, host, port);
}
void ParseUrl(const TStringBuf url, THttpURL::EKind& kind, TString& host, ui16& port) {
using namespace NUri;
static const int URI_PARSE_FLAGS =
TFeature::FeatureSchemeKnown | TFeature::FeatureConvertHostIDN | TFeature::FeatureEncodeExtendedDelim | TFeature::FeatureEncodePercent;
TUri uri;
// Cut out url's path to speedup processing.
if (uri.Parse(GetSchemeHostAndPort(url, false, false), URI_PARSE_FLAGS) != TUri::ParsedOK) {
ythrow yexception() << "can't parse url: " << url;
}
kind = uri.GetScheme();
host = uri.GetField(TField::FieldHost);
port = uri.GetPort();
}
}
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