364 lines
9.1 KiB
C++
364 lines
9.1 KiB
C++
/*
|
|
* Lightweight URL & URI parser (RFC 1738, RFC 3986)
|
|
* https://github.com/corporateshark/LUrlParser
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (C) 2015 Sergey Kosarevsky (sk@linderdaum.com)
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
* IXUrlParser.cpp
|
|
* Author: Benjamin Sergeant
|
|
* Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
|
|
*/
|
|
|
|
#include "IXUrlParser.h"
|
|
|
|
#include <algorithm>
|
|
#include <cstdlib>
|
|
#include <cstring>
|
|
|
|
namespace
|
|
{
|
|
enum LUrlParserError {
|
|
LUrlParserError_Ok = 0,
|
|
LUrlParserError_Uninitialized = 1,
|
|
LUrlParserError_NoUrlCharacter = 2,
|
|
LUrlParserError_InvalidSchemeName = 3,
|
|
LUrlParserError_NoDoubleSlash = 4,
|
|
LUrlParserError_NoAtSign = 5,
|
|
LUrlParserError_UnexpectedEndOfLine = 6,
|
|
LUrlParserError_NoSlash = 7,
|
|
};
|
|
|
|
class clParseURL
|
|
{
|
|
public:
|
|
LUrlParserError m_ErrorCode;
|
|
std::string m_Scheme;
|
|
std::string m_Host;
|
|
std::string m_Port;
|
|
std::string m_Path;
|
|
std::string m_Query;
|
|
std::string m_Fragment;
|
|
std::string m_UserName;
|
|
std::string m_Password;
|
|
|
|
clParseURL() : m_ErrorCode(LUrlParserError_Uninitialized) {}
|
|
|
|
/// return 'true' if the parsing was successful
|
|
bool IsValid() const { return m_ErrorCode == LUrlParserError_Ok; }
|
|
|
|
/// helper to convert the port number to int, return 'true' if the port is
|
|
/// valid (within the 0..65535 range)
|
|
bool GetPort(int *OutPort) const;
|
|
|
|
/// parse the URL
|
|
static clParseURL ParseURL(const std::string &URL);
|
|
|
|
private:
|
|
explicit clParseURL(LUrlParserError ErrorCode) : m_ErrorCode(ErrorCode) {}
|
|
};
|
|
|
|
static bool IsSchemeValid(const std::string &SchemeName)
|
|
{
|
|
for (auto c : SchemeName) {
|
|
if (!isalpha(c) && c != '+' && c != '-' && c != '.')
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool clParseURL::GetPort(int *OutPort) const
|
|
{
|
|
if (!IsValid()) {
|
|
return false;
|
|
}
|
|
|
|
int Port = atoi(m_Port.c_str());
|
|
|
|
if (Port <= 0 || Port > 65535) {
|
|
return false;
|
|
}
|
|
|
|
if (OutPort) {
|
|
*OutPort = Port;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// based on RFC 1738 and RFC 3986
|
|
clParseURL clParseURL::ParseURL(const std::string &URL)
|
|
{
|
|
clParseURL Result;
|
|
|
|
const char *CurrentString = URL.c_str();
|
|
|
|
/*
|
|
* <scheme>:<scheme-specific-part>
|
|
* <scheme> := [a-z\+\-\.]+
|
|
* For resiliency, programs interpreting URLs should treat upper case
|
|
*letters as equivalent to lower case in scheme names
|
|
*/
|
|
|
|
// try to read scheme
|
|
{
|
|
const char *LocalString = strchr(CurrentString, ':');
|
|
|
|
if (!LocalString) {
|
|
return clParseURL(LUrlParserError_NoUrlCharacter);
|
|
}
|
|
|
|
// save the scheme name
|
|
Result.m_Scheme =
|
|
std::string(CurrentString, LocalString - CurrentString);
|
|
|
|
if (!IsSchemeValid(Result.m_Scheme)) {
|
|
return clParseURL(LUrlParserError_InvalidSchemeName);
|
|
}
|
|
|
|
// scheme should be lowercase
|
|
std::transform(Result.m_Scheme.begin(),
|
|
Result.m_Scheme.end(),
|
|
Result.m_Scheme.begin(),
|
|
::tolower);
|
|
|
|
// skip ':'
|
|
CurrentString = LocalString + 1;
|
|
}
|
|
|
|
/*
|
|
* //<user>:<password>@<host>:<port>/<url-path>
|
|
* any ":", "@" and "/" must be normalized
|
|
*/
|
|
|
|
// skip "//"
|
|
if (*CurrentString++ != '/')
|
|
return clParseURL(LUrlParserError_NoDoubleSlash);
|
|
if (*CurrentString++ != '/')
|
|
return clParseURL(LUrlParserError_NoDoubleSlash);
|
|
|
|
// check if the user name and password are specified
|
|
bool bHasUserName = false;
|
|
|
|
const char *LocalString = CurrentString;
|
|
|
|
while (*LocalString) {
|
|
if (*LocalString == '@') {
|
|
// user name and password are specified
|
|
bHasUserName = true;
|
|
break;
|
|
} else if (*LocalString == '/') {
|
|
// end of <host>:<port> specification
|
|
bHasUserName = false;
|
|
break;
|
|
}
|
|
|
|
LocalString++;
|
|
}
|
|
|
|
// user name and password
|
|
LocalString = CurrentString;
|
|
|
|
if (bHasUserName) {
|
|
// read user name
|
|
while (*LocalString && *LocalString != ':' && *LocalString != '@')
|
|
LocalString++;
|
|
|
|
Result.m_UserName =
|
|
std::string(CurrentString, LocalString - CurrentString);
|
|
|
|
// proceed with the current pointer
|
|
CurrentString = LocalString;
|
|
|
|
if (*CurrentString == ':') {
|
|
// skip ':'
|
|
CurrentString++;
|
|
|
|
// read password
|
|
LocalString = CurrentString;
|
|
|
|
while (*LocalString && *LocalString != '@')
|
|
LocalString++;
|
|
|
|
Result.m_Password =
|
|
std::string(CurrentString, LocalString - CurrentString);
|
|
|
|
CurrentString = LocalString;
|
|
}
|
|
|
|
// skip '@'
|
|
if (*CurrentString != '@') {
|
|
return clParseURL(LUrlParserError_NoAtSign);
|
|
}
|
|
|
|
CurrentString++;
|
|
}
|
|
|
|
bool bHasBracket = (*CurrentString == '[');
|
|
|
|
// go ahead, read the host name
|
|
LocalString = CurrentString;
|
|
|
|
while (*LocalString) {
|
|
if (bHasBracket && *LocalString == ']') {
|
|
// end of IPv6 address
|
|
LocalString++;
|
|
break;
|
|
} else if (!bHasBracket &&
|
|
(*LocalString == ':' || *LocalString == '/')) {
|
|
// port number is specified
|
|
break;
|
|
}
|
|
|
|
LocalString++;
|
|
}
|
|
|
|
Result.m_Host = std::string(CurrentString, LocalString - CurrentString);
|
|
|
|
CurrentString = LocalString;
|
|
|
|
// is port number specified?
|
|
if (*CurrentString == ':') {
|
|
CurrentString++;
|
|
|
|
// read port number
|
|
LocalString = CurrentString;
|
|
|
|
while (*LocalString && *LocalString != '/')
|
|
LocalString++;
|
|
|
|
Result.m_Port = std::string(CurrentString, LocalString - CurrentString);
|
|
|
|
CurrentString = LocalString;
|
|
}
|
|
|
|
// end of string
|
|
if (!*CurrentString) {
|
|
Result.m_ErrorCode = LUrlParserError_Ok;
|
|
|
|
return Result;
|
|
}
|
|
|
|
// skip '/'
|
|
if (*CurrentString != '/') {
|
|
return clParseURL(LUrlParserError_NoSlash);
|
|
}
|
|
|
|
CurrentString++;
|
|
|
|
// parse the path
|
|
LocalString = CurrentString;
|
|
|
|
while (*LocalString && *LocalString != '#' && *LocalString != '?')
|
|
LocalString++;
|
|
|
|
Result.m_Path = std::string(CurrentString, LocalString - CurrentString);
|
|
|
|
CurrentString = LocalString;
|
|
|
|
// check for query
|
|
if (*CurrentString == '?') {
|
|
// skip '?'
|
|
CurrentString++;
|
|
|
|
// read query
|
|
LocalString = CurrentString;
|
|
|
|
while (*LocalString && *LocalString != '#')
|
|
LocalString++;
|
|
|
|
Result.m_Query =
|
|
std::string(CurrentString, LocalString - CurrentString);
|
|
|
|
CurrentString = LocalString;
|
|
}
|
|
|
|
// check for fragment
|
|
if (*CurrentString == '#') {
|
|
// skip '#'
|
|
CurrentString++;
|
|
|
|
// read fragment
|
|
LocalString = CurrentString;
|
|
|
|
while (*LocalString)
|
|
LocalString++;
|
|
|
|
Result.m_Fragment =
|
|
std::string(CurrentString, LocalString - CurrentString);
|
|
}
|
|
|
|
Result.m_ErrorCode = LUrlParserError_Ok;
|
|
|
|
return Result;
|
|
}
|
|
} // namespace
|
|
|
|
namespace ix
|
|
{
|
|
bool UrlParser::parse(const std::string &url,
|
|
std::string &protocol,
|
|
std::string &host,
|
|
std::string &path,
|
|
std::string &query,
|
|
int &port)
|
|
{
|
|
clParseURL res = clParseURL::ParseURL(url);
|
|
|
|
if (!res.IsValid()) {
|
|
return false;
|
|
}
|
|
|
|
protocol = res.m_Scheme;
|
|
host = res.m_Host;
|
|
path = res.m_Path;
|
|
query = res.m_Query;
|
|
|
|
if (!res.GetPort(&port)) {
|
|
if (protocol == "ws" || protocol == "http") {
|
|
port = 80;
|
|
} else if (protocol == "wss" || protocol == "https") {
|
|
port = 443;
|
|
} else {
|
|
// Invalid protocol. Should be caught by regex check
|
|
// but this missing branch trigger cpplint linter.
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (path.empty()) {
|
|
path = "/";
|
|
} else if (path[0] != '/') {
|
|
path = '/' + path;
|
|
}
|
|
|
|
if (!query.empty()) {
|
|
path += "?";
|
|
path += query;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
} // namespace ix
|