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/*
* Copyright (c) 2011-2018 Isode Limited.
* All rights reserved.
* See the COPYING file for more information.
*/
#include <Swiften/Parser/BOSHBodyExtractor.h>
#include <memory>
#include <Swiften/Parser/XMLParser.h>
#include <Swiften/Parser/XMLParserClient.h>
#include <Swiften/Parser/XMLParserFactory.h>
namespace Swift {
class BOSHBodyParserClient : public XMLParserClient {
public:
BOSHBodyParserClient(BOSHBodyExtractor* bodyExtractor) : bodyExtractor(bodyExtractor) {
}
virtual void handleStartElement(const std::string&, const std::string&, const AttributeMap& attributes) {
bodyExtractor->body->attributes = attributes;
}
virtual void handleEndElement(const std::string&, const std::string&) {
}
virtual void handleCharacterData(const std::string&) {
}
private:
BOSHBodyExtractor* bodyExtractor;
};
inline bool isWhitespace(unsigned char c) {
return c == ' ' || c == '\n' || c == '\t' || c == '\r';
}
BOSHBodyExtractor::BOSHBodyExtractor(XMLParserFactory* parserFactory, const ByteArray& data) {
// Look for the opening body element
ByteArray::const_iterator i = data.begin();
while (i < data.end() && isWhitespace(*i)) {
++i;
}
if (std::distance(i, data.end()) < 6 || *i != '<' || *(i+1) != 'b' || *(i+2) != 'o' || *(i+3) != 'd' || *(i+4) != 'y' || !(isWhitespace(*(i+5)) || *(i+5) == '>' || *(i+5) == '/')) {
return;
}
i += 5;
// Parse until end of element
bool inSingleQuote = false;
bool inDoubleQuote = false;
bool endStartTagSeen = false;
bool endElementSeen = false;
for (; i != data.end(); ++i) {
char c = static_cast<char>(*i);
if (inSingleQuote) {
if (c == '\'') {
inSingleQuote = false;
}
}
else if (inDoubleQuote) {
if (c == '"') {
inDoubleQuote = false;
}
}
else if (c == '\'') {
inSingleQuote = true;
}
else if (c == '"') {
inDoubleQuote = true;
}
else if (c == '/') {
if (i + 1 == data.end() || *(i+1) != '>') {
return;
}
else {
endElementSeen = true;
endStartTagSeen = true;
i += 2;
break;
}
}
else if (c == '>') {
endStartTagSeen = true;
i += 1;
break;
}
}
if (!endStartTagSeen) {
return;
}
// Look for the end of the element
ByteArray::const_reverse_iterator j = data.rbegin();
if (!endElementSeen) {
while (isWhitespace(*j) && j < data.rend()) {
++j;
}
if (j == data.rend() || *j != '>') {
return;
}
++j;
while (j < data.rend() && isWhitespace(*j)) {
++j;
}
if (std::distance(j, data.rend()) < 6 || *(j+5) != '<' || *(j+4) != '/' || *(j+3) != 'b' || *(j+2) != 'o' || *(j+1) != 'd' || *j != 'y') {
return;
}
j += 6;
}
body = BOSHBody();
if (!endElementSeen) {
assert(i <= j.base());
body->content = std::string(
reinterpret_cast<const char*>(vecptr(data) + std::distance(data.begin(), i)),
static_cast<size_t>(std::distance(i, j.base())));
}
// Parse the body element
BOSHBodyParserClient parserClient(this);
std::shared_ptr<XMLParser> parser(parserFactory->createXMLParser(&parserClient));
assert(data.begin() <= i);
if (!parser->parse(std::string(
reinterpret_cast<const char*>(vecptr(data)),
static_cast<size_t>(std::distance(data.begin(), i))))) {
/* TODO: This needs to be only validating the BOSH <body> element, so that XMPP parsing errors are caught at
the correct higher layer */
body = boost::optional<BOSHBody>();
return;
}
}
}
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