llvm-project/lldb/source/Utility/UriParser.cpp

//===-- UriParser.cpp -------------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "Utility/UriParser.h"

// C Includes

// C++ Includes
#include <cstring>

// Other libraries and framework includes
// Project includes
#include "lldb/Host/StringConvert.h"

using namespace lldb_private;

//----------------------------------------------------------------------
// UriParser::Parse
//----------------------------------------------------------------------
bool
UriParser::Parse(const std::string& uri,
                 std::string& scheme,
                 std::string& hostname,
                 int& port,
                 std::string& path)
{
    std::string tmp_scheme, tmp_hostname, tmp_port, tmp_path;

    static const char* kSchemeSep = "://";
    auto pos = uri.find(kSchemeSep);
    if (pos == std::string::npos)
        return false;

    // Extract path.
    tmp_scheme = uri.substr(0, pos);
    auto host_pos = pos + strlen(kSchemeSep);
    auto path_pos = uri.find('/', host_pos);
    if (path_pos != std::string::npos)
        tmp_path = uri.substr(path_pos);
    else
        tmp_path = "/";

    auto host_port = uri.substr(
        host_pos, ((path_pos != std::string::npos) ? path_pos  : uri.size()) - host_pos);

    // Extract hostname
    if (host_port[0] == '[')
    {
        // hostname is enclosed with square brackets.
        pos = host_port.find(']');
        if (pos == std::string::npos)
            return false;

        tmp_hostname = host_port.substr(1, pos - 1);
        host_port.erase(0, pos + 1);
    }
    else
    {
        pos = host_port.find(':');
        tmp_hostname = host_port.substr(0, (pos != std::string::npos) ? pos : host_port.size());
        host_port.erase(0, (pos != std::string::npos) ? pos : host_port.size());
    }

    // Extract port
    tmp_port = host_port;
    if (!tmp_port.empty())
    {
        if (tmp_port[0] != ':')
            return false;
        tmp_port = tmp_port.substr(1);
        bool success = false;
        auto port_tmp = StringConvert::ToUInt32(tmp_port.c_str(), UINT32_MAX, 10, &success);
        if (!success || port_tmp > 65535)
        {
            // there are invalid characters in port_buf
            return false;
        }
        port = port_tmp;
    }
    else
        port = -1;

    scheme = tmp_scheme;
    hostname = tmp_hostname;
    path = tmp_path;
    return true;
}