lldb/source/Utility/UriParser.cpp

   1 //===-- UriParser.cpp -----------------------------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "lldb/Utility/UriParser.h"
  10 #include "llvm/Support/raw_ostream.h"
  11
  12 #include <string>
  13
  14 #include <cstdint>
  15 #include <tuple>
  16
  17 using namespace lldb_private;
  18
  19 llvm::raw_ostream &lldb_private::operator<<(llvm::raw_ostream &OS,
  20                                             const URI &U) {
  21   OS << U.scheme << "://[" << U.hostname << ']';
  22   if (U.port)
  23     OS << ':' << U.port.getValue();
  24   return OS << U.path;
  25 }
  26
  27 llvm::Optional<URI> URI::Parse(llvm::StringRef uri) {
  28   URI ret;
  29
  30   const llvm::StringRef kSchemeSep("://");
  31   auto pos = uri.find(kSchemeSep);
  32   if (pos == std::string::npos)
  33     return llvm::None;
  34
  35   // Extract path.
  36   ret.scheme = uri.substr(0, pos);
  37   auto host_pos = pos + kSchemeSep.size();
  38   auto path_pos = uri.find('/', host_pos);
  39   if (path_pos != std::string::npos)
  40     ret.path = uri.substr(path_pos);
  41   else
  42     ret.path = "/";
  43
  44   auto host_port = uri.substr(
  45       host_pos,
  46       ((path_pos != std::string::npos) ? path_pos : uri.size()) - host_pos);
  47
  48   // Extract hostname
  49   if (!host_port.empty() && host_port[0] == '[') {
  50     // hostname is enclosed with square brackets.
  51     pos = host_port.rfind(']');
  52     if (pos == std::string::npos)
  53       return llvm::None;
  54
  55     ret.hostname = host_port.substr(1, pos - 1);
  56     host_port = host_port.drop_front(pos + 1);
  57     if (!host_port.empty() && !host_port.consume_front(":"))
  58       return llvm::None;
  59   } else {
  60     std::tie(ret.hostname, host_port) = host_port.split(':');
  61   }
  62
  63   // Extract port
  64   if (!host_port.empty()) {
  65     uint16_t port_value = 0;
  66     if (host_port.getAsInteger(0, port_value))
  67       return llvm::None;
  68     ret.port = port_value;
  69   } else
  70     ret.port = llvm::None;
  71
  72   return ret;
  73 }