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442 lines (373 loc) · 8.86 KB
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//
// HTMLForm.cpp
//
// $Id: //poco/1.4/Net/src/HTMLForm.cpp#4 $
//
// Library: Net
// Package: HTML
// Module: HTMLForm
//
// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/Net/HTMLForm.h"
#include "Poco/Net/HTTPRequest.h"
#include "Poco/Net/PartSource.h"
#include "Poco/Net/PartHandler.h"
#include "Poco/Net/MultipartWriter.h"
#include "Poco/Net/MultipartReader.h"
#include "Poco/Net/NullPartHandler.h"
#include "Poco/Net/NetException.h"
#include "Poco/NullStream.h"
#include "Poco/CountingStream.h"
#include "Poco/StreamCopier.h"
#include "Poco/URI.h"
#include "Poco/String.h"
#include "Poco/CountingStream.h"
#include "Poco/UTF8String.h"
#include <sstream>
using Poco::NullInputStream;
using Poco::StreamCopier;
using Poco::SyntaxException;
using Poco::URI;
using Poco::icompare;
namespace Poco {
namespace Net {
const std::string HTMLForm::ENCODING_URL = "application/x-www-form-urlencoded";
const std::string HTMLForm::ENCODING_MULTIPART = "multipart/form-data";
const int HTMLForm::UNKNOWN_CONTENT_LENGTH = -1;
class HTMLFormCountingOutputStream: public CountingOutputStream
{
public:
HTMLFormCountingOutputStream():
_valid(true)
{
}
bool isValid() const
{
return _valid;
}
void setValid(bool v)
{
_valid = v;
}
private:
bool _valid;
};
HTMLForm::HTMLForm():
_fieldLimit(DFL_FIELD_LIMIT),
_encoding(ENCODING_URL)
{
}
HTMLForm::HTMLForm(const std::string& encoding):
_fieldLimit(DFL_FIELD_LIMIT),
_encoding(encoding)
{
}
HTMLForm::HTMLForm(const HTTPRequest& request, std::istream& requestBody, PartHandler& handler):
_fieldLimit(DFL_FIELD_LIMIT)
{
load(request, requestBody, handler);
}
HTMLForm::HTMLForm(const HTTPRequest& request, std::istream& requestBody):
_fieldLimit(DFL_FIELD_LIMIT)
{
load(request, requestBody);
}
HTMLForm::HTMLForm(const HTTPRequest& request):
_fieldLimit(DFL_FIELD_LIMIT)
{
load(request);
}
HTMLForm::~HTMLForm()
{
for (PartVec::iterator it = _parts.begin(); it != _parts.end(); ++it)
{
delete it->pSource;
}
}
void HTMLForm::setEncoding(const std::string& encoding)
{
_encoding = encoding;
}
void HTMLForm::addPart(const std::string& name, PartSource* pSource)
{
poco_check_ptr (pSource);
Part part;
part.name = name;
part.pSource = pSource;
_parts.push_back(part);
}
void HTMLForm::load(const HTTPRequest& request, std::istream& requestBody, PartHandler& handler)
{
clear();
URI uri(request.getURI());
const std::string& query = uri.getRawQuery();
if (!query.empty())
{
std::istringstream istr(query);
readUrl(istr);
}
if (request.getMethod() == HTTPRequest::HTTP_POST || request.getMethod() == HTTPRequest::HTTP_PUT)
{
std::string mediaType;
NameValueCollection params;
MessageHeader::splitParameters(request.getContentType(), mediaType, params);
_encoding = mediaType;
if (_encoding == ENCODING_MULTIPART)
{
_boundary = params["boundary"];
readMultipart(requestBody, handler);
}
else
{
readUrl(requestBody);
}
}
}
void HTMLForm::load(const HTTPRequest& request, std::istream& requestBody)
{
NullPartHandler nah;
load(request, requestBody, nah);
}
void HTMLForm::load(const HTTPRequest& request)
{
NullPartHandler nah;
NullInputStream nis;
load(request, nis, nah);
}
void HTMLForm::read(std::istream& istr, PartHandler& handler)
{
if (_encoding == ENCODING_URL)
readUrl(istr);
else
readMultipart(istr, handler);
}
void HTMLForm::read(std::istream& istr)
{
readUrl(istr);
}
void HTMLForm::read(const std::string& queryString)
{
std::istringstream istr(queryString);
readUrl(istr);
}
void HTMLForm::prepareSubmit(HTTPRequest& request)
{
if (request.getMethod() == HTTPRequest::HTTP_POST || request.getMethod() == HTTPRequest::HTTP_PUT)
{
if (_encoding == ENCODING_URL)
{
request.setContentType(_encoding);
request.setChunkedTransferEncoding(false);
Poco::CountingOutputStream ostr;
writeUrl(ostr);
request.setContentLength(ostr.chars());
}
else
{
_boundary = MultipartWriter::createBoundary();
std::string ct(_encoding);
ct.append("; boundary=\"");
ct.append(_boundary);
ct.append("\"");
request.setContentType(ct);
}
if (request.getVersion() == HTTPMessage::HTTP_1_0)
{
request.setKeepAlive(false);
request.setChunkedTransferEncoding(false);
}
else if (_encoding != ENCODING_URL)
{
request.setChunkedTransferEncoding(true);
}
}
else
{
std::string uri = request.getURI();
std::ostringstream ostr;
writeUrl(ostr);
uri.append("?");
uri.append(ostr.str());
request.setURI(uri);
}
}
std::streamsize HTMLForm::calculateContentLength()
{
if (_boundary.empty())
throw HTMLFormException("Form must be prepared");
HTMLFormCountingOutputStream c;
write(c);
if (c.isValid())
return c.chars();
else
return UNKNOWN_CONTENT_LENGTH;
}
void HTMLForm::write(std::ostream& ostr, const std::string& boundary)
{
if (_encoding == ENCODING_URL)
{
writeUrl(ostr);
}
else
{
_boundary = boundary;
writeMultipart(ostr);
}
}
void HTMLForm::write(std::ostream& ostr)
{
if (_encoding == ENCODING_URL)
writeUrl(ostr);
else
writeMultipart(ostr);
}
void HTMLForm::readUrl(std::istream& istr)
{
static const int eof = std::char_traits<char>::eof();
int fields = 0;
int ch = istr.get();
bool isFirst = true;
while (ch != eof)
{
if (_fieldLimit > 0 && fields == _fieldLimit)
throw HTMLFormException("Too many form fields");
std::string name;
std::string value;
while (ch != eof && ch != '=' && ch != '&')
{
if (ch == '+') ch = ' ';
name += (char) ch;
ch = istr.get();
}
if (ch == '=')
{
ch = istr.get();
while (ch != eof && ch != '&')
{
if (ch == '+') ch = ' ';
value += (char) ch;
ch = istr.get();
}
}
// remove UTF-8 byte order mark from first name, if present
if (isFirst)
{
UTF8::removeBOM(name);
}
std::string decodedName;
std::string decodedValue;
URI::decode(name, decodedName);
URI::decode(value, decodedValue);
add(decodedName, decodedValue);
++fields;
if (ch == '&') ch = istr.get();
isFirst = false;
}
}
void HTMLForm::readMultipart(std::istream& istr, PartHandler& handler)
{
static const int eof = std::char_traits<char>::eof();
int fields = 0;
MultipartReader reader(istr, _boundary);
while (reader.hasNextPart())
{
if (_fieldLimit > 0 && fields == _fieldLimit)
throw HTMLFormException("Too many form fields");
MessageHeader header;
reader.nextPart(header);
std::string disp;
NameValueCollection params;
if (header.has("Content-Disposition"))
{
std::string cd = header.get("Content-Disposition");
MessageHeader::splitParameters(cd, disp, params);
}
if (params.has("filename"))
{
handler.handlePart(header, reader.stream());
// Ensure that the complete part has been read.
while (reader.stream().good()) reader.stream().get();
}
else
{
std::string name = params["name"];
std::string value;
std::istream& istr = reader.stream();
int ch = istr.get();
while (ch != eof)
{
value += (char) ch;
ch = istr.get();
}
add(name, value);
}
++fields;
}
}
void HTMLForm::writeUrl(std::ostream& ostr)
{
for (NameValueCollection::ConstIterator it = begin(); it != end(); ++it)
{
if (it != begin()) ostr << "&";
std::string name;
URI::encode(it->first, "!?#/'\",;:$&()[]*+=@", name);
std::string value;
URI::encode(it->second, "!?#/'\",;:$&()[]*+=@", value);
ostr << name << "=" << value;
}
}
void HTMLForm::writeMultipart(std::ostream& ostr)
{
HTMLFormCountingOutputStream *costr(dynamic_cast<HTMLFormCountingOutputStream*>(&ostr));
MultipartWriter writer(ostr, _boundary);
for (NameValueCollection::ConstIterator it = begin(); it != end(); ++it)
{
MessageHeader header;
std::string disp("form-data; name=\"");
disp.append(it->first);
disp.append("\"");
header.set("Content-Disposition", disp);
writer.nextPart(header);
ostr << it->second;
}
for (PartVec::iterator ita = _parts.begin(); ita != _parts.end(); ++ita)
{
MessageHeader header(ita->pSource->headers());
std::string disp("form-data; name=\"");
disp.append(ita->name);
disp.append("\"");
std::string filename = ita->pSource->filename();
if (!filename.empty())
{
disp.append("; filename=\"");
disp.append(filename);
disp.append("\"");
}
header.set("Content-Disposition", disp);
header.set("Content-Type", ita->pSource->mediaType());
writer.nextPart(header);
if (costr)
{
// count only, don't move stream position
std::streamsize partlen = ita->pSource->getContentLength();
if (partlen != PartSource::UNKNOWN_CONTENT_LENGTH)
costr->addChars(static_cast<int>(partlen));
else
costr->setValid(false);
}
else
StreamCopier::copyStream(ita->pSource->stream(), ostr);
}
writer.close();
_boundary = writer.boundary();
}
void HTMLForm::setFieldLimit(int limit)
{
poco_assert (limit >= 0);
_fieldLimit = limit;
}
} } // namespace Poco::Net