Revert of Remove webrtc/libjingle/{xmllite,xmpp}

webrtc/libjingle/xmpp/jid.cc

+/*
+ *  Copyright 2004 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/libjingle/xmpp/jid.h"
+
+#include <ctype.h>
+
+#include <algorithm>
+#include <string>
+
+#include "webrtc/libjingle/xmpp/constants.h"
+#include "webrtc/base/common.h"
+#include "webrtc/base/logging.h"
+
+namespace buzz {
+
+Jid::Jid() {
+}
+
+Jid::Jid(const std::string& jid_string) {
+  if (jid_string.empty())
+    return;
+
+  // First find the slash and slice off that part
+  size_t slash = jid_string.find('/');
+  resource_name_ = (slash == std::string::npos ? STR_EMPTY :
+                    jid_string.substr(slash + 1));
+
+  // Now look for the node
+  size_t at = jid_string.find('@');
+  size_t domain_begin;
+  if (at < slash && at != std::string::npos) {
+    node_name_ = jid_string.substr(0, at);
+    domain_begin = at + 1;
+  } else {
+    domain_begin = 0;
+  }
+
+  // Now take what is left as the domain
+  size_t domain_length = (slash == std::string::npos) ?
+      (jid_string.length() - domain_begin) : (slash - domain_begin);
+  domain_name_ = jid_string.substr(domain_begin, domain_length);
+
+  ValidateOrReset();
+}
+
+Jid::Jid(const std::string& node_name,
+         const std::string& domain_name,
+         const std::string& resource_name)
+    :  node_name_(node_name),
+       domain_name_(domain_name),
+       resource_name_(resource_name) {
+  ValidateOrReset();
+}
+
+void Jid::ValidateOrReset() {
+  bool valid_node;
+  bool valid_domain;
+  bool valid_resource;
+
+  node_name_ = PrepNode(node_name_, &valid_node);
+  domain_name_ = PrepDomain(domain_name_, &valid_domain);
+  resource_name_ = PrepResource(resource_name_, &valid_resource);
+
+  if (!valid_node || !valid_domain || !valid_resource) {
+    node_name_.clear();
+    domain_name_.clear();
+    resource_name_.clear();
+  }
+}
+
+std::string Jid::Str() const {
+  if (!IsValid())
+    return STR_EMPTY;
+
+  std::string ret;
+
+  if (!node_name_.empty())
+    ret = node_name_ + "@";
+
+  ASSERT(domain_name_ != STR_EMPTY);
+  ret += domain_name_;
+
+  if (!resource_name_.empty())
+    ret += "/" + resource_name_;
+
+  return ret;
+}
+
+Jid::~Jid() {
+}
+
+bool Jid::IsEmpty() const {
+  return (node_name_.empty() && domain_name_.empty() &&
+          resource_name_.empty());
+}
+
+bool Jid::IsValid() const {
+  return !domain_name_.empty();
+}
+
+bool Jid::IsBare() const {
+  if (IsEmpty()) {
+    LOG(LS_VERBOSE) << "Warning: Calling IsBare() on the empty jid.";
+    return true;
+  }
+  return IsValid() && resource_name_.empty();
+}
+
+bool Jid::IsFull() const {
+  return IsValid() && !resource_name_.empty();
+}
+
+Jid Jid::BareJid() const {
+  if (!IsValid())
+    return Jid();
+  if (!IsFull())
+    return *this;
+  return Jid(node_name_, domain_name_, STR_EMPTY);
+}
+
+bool Jid::BareEquals(const Jid& other) const {
+  return other.node_name_ == node_name_ &&
+      other.domain_name_ == domain_name_;
+}
+
+void Jid::CopyFrom(const Jid& jid) {
+  this->node_name_ = jid.node_name_;
+  this->domain_name_ = jid.domain_name_;
+  this->resource_name_ = jid.resource_name_;
+}
+
+bool Jid::operator==(const Jid& other) const {
+  return other.node_name_ == node_name_ &&
+      other.domain_name_ == domain_name_ &&
+      other.resource_name_ == resource_name_;
+}
+
+int Jid::Compare(const Jid& other) const {
+  int compare_result;
+  compare_result = node_name_.compare(other.node_name_);
+  if (0 != compare_result)
+    return compare_result;
+  compare_result = domain_name_.compare(other.domain_name_);
+  if (0 != compare_result)
+    return compare_result;
+  compare_result = resource_name_.compare(other.resource_name_);
+  return compare_result;
+}
+
+// --- JID parsing code: ---
+
+// Checks and normalizes the node part of a JID.
+std::string Jid::PrepNode(const std::string& node, bool* valid) {
+  *valid = false;
+  std::string result;
+
+  for (std::string::const_iterator i = node.begin(); i < node.end(); ++i) {
+    bool char_valid = true;
+    unsigned char ch = *i;
+    if (ch <= 0x7F) {
+      result += PrepNodeAscii(ch, &char_valid);
+    }
+    else {
+      // TODO: implement the correct stringprep protocol for these
+      result += tolower(ch);
+    }
+    if (!char_valid) {
+      return STR_EMPTY;
+    }
+  }
+
+  if (result.length() > 1023) {
+    return STR_EMPTY;
+  }
+  *valid = true;
+  return result;
+}
+
+
+// Returns the appropriate mapping for an ASCII character in a node.
+char Jid::PrepNodeAscii(char ch, bool* valid) {
+  *valid = true;
+  switch (ch) {
+    case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
+    case 'H': case 'I': case 'J': case 'K': case 'L': case 'M': case 'N':
+    case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U':
+    case 'V': case 'W': case 'X': case 'Y': case 'Z':
+      return (char)(ch + ('a' - 'A'));
+
+    case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05:
+    case 0x06: case 0x07: case 0x08: case 0x09: case 0x0A: case 0x0B:
+    case 0x0C: case 0x0D: case 0x0E: case 0x0F: case 0x10: case 0x11:
+    case 0x12: case 0x13: case 0x14: case 0x15: case 0x16: case 0x17:
+    case ' ': case '&': case '/': case ':': case '<': case '>': case '@':
+    case '\"': case '\'':
+    case 0x7F:
+      *valid = false;
+      return 0;
+
+    default:
+      return ch;
+  }
+}
+
+
+// Checks and normalizes the resource part of a JID.
+std::string Jid::PrepResource(const std::string& resource, bool* valid) {
+  *valid = false;
+  std::string result;
+
+  for (std::string::const_iterator i = resource.begin();
+       i < resource.end(); ++i) {
+    bool char_valid = true;
+    unsigned char ch = *i;
+    if (ch <= 0x7F) {
+      result += PrepResourceAscii(ch, &char_valid);
+    }
+    else {
+      // TODO: implement the correct stringprep protocol for these
+      result += ch;
+    }
+  }
+
+  if (result.length() > 1023) {
+    return STR_EMPTY;
+  }
+  *valid = true;
+  return result;
+}
+
+// Returns the appropriate mapping for an ASCII character in a resource.
+char Jid::PrepResourceAscii(char ch, bool* valid) {
+  *valid = true;
+  switch (ch) {
+    case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05:
+    case 0x06: case 0x07: case 0x08: case 0x09: case 0x0A: case 0x0B:
+    case 0x0C: case 0x0D: case 0x0E: case 0x0F: case 0x10: case 0x11:
+    case 0x12: case 0x13: case 0x14: case 0x15: case 0x16: case 0x17:
+    case 0x7F:
+      *valid = false;
+      return 0;
+
+    default:
+      return ch;
+  }
+}
+
+// Checks and normalizes the domain part of a JID.
+std::string Jid::PrepDomain(const std::string& domain, bool* valid) {
+  *valid = false;
+  std::string result;
+
+  // TODO: if the domain contains a ':', then we should parse it
+  // as an IPv6 address rather than giving an error about illegal domain.
+  PrepDomain(domain, &result, valid);
+  if (!*valid) {
+    return STR_EMPTY;
+  }
+
+  if (result.length() > 1023) {
+    return STR_EMPTY;
+  }
+  *valid = true;
+  return result;
+}
+
+
+// Checks and normalizes an IDNA domain.
+void Jid::PrepDomain(const std::string& domain, std::string* buf, bool* valid) {
+  *valid = false;
+  std::string::const_iterator last = domain.begin();
+  for (std::string::const_iterator i = domain.begin(); i < domain.end(); ++i) {
+    bool label_valid = true;
+    char ch = *i;
+    switch (ch) {
+      case 0x002E:
+#if 0 // FIX: This isn't UTF-8-aware.
+      case 0x3002:
+      case 0xFF0E:
+      case 0xFF61:
+#endif
+        PrepDomainLabel(last, i, buf, &label_valid);
+        *buf += '.';
+        last = i + 1;
+        break;
+    }
+    if (!label_valid) {
+      return;
+    }
+  }
+  PrepDomainLabel(last, domain.end(), buf, valid);
+}
+
+// Checks and normalizes a domain label.
+void Jid::PrepDomainLabel(
+    std::string::const_iterator start, std::string::const_iterator end,
+    std::string* buf, bool* valid) {
+  *valid = false;
+
+  int start_len = static_cast<int>(buf->length());
+  for (std::string::const_iterator i = start; i < end; ++i) {
+    bool char_valid = true;
+    unsigned char ch = *i;
+    if (ch <= 0x7F) {
+      *buf += PrepDomainLabelAscii(ch, &char_valid);
+    }
+    else {
+      // TODO: implement ToASCII for these
+      *buf += ch;
+    }
+    if (!char_valid) {
+      return;
+    }
+  }
+
+  int count = static_cast<int>(buf->length() - start_len);
+  if (count == 0) {
+    return;
+  }
+  else if (count > 63) {
+    return;
+  }
+
+  // Is this check needed? See comment in PrepDomainLabelAscii.
+  if ((*buf)[start_len] == '-') {
+    return;
+  }
+  if ((*buf)[buf->length() - 1] == '-') {
+    return;
+  }
+  *valid = true;
+}
+
+
+// Returns the appropriate mapping for an ASCII character in a domain label.
+char Jid::PrepDomainLabelAscii(char ch, bool* valid) {
+  *valid = true;
+  // TODO: A literal reading of the spec seems to say that we do
+  // not need to check for these illegal characters (an "internationalized
+  // domain label" runs ToASCII with UseSTD3... set to false).  But that
+  // can't be right.  We should at least be checking that there are no '/'
+  // or '@' characters in the domain.  Perhaps we should see what others
+  // do in this case.
+
+  switch (ch) {
+    case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
+    case 'H': case 'I': case 'J': case 'K': case 'L': case 'M': case 'N':
+    case 'O': case 'P': case 'Q': case 'R': case 'S': case 'T': case 'U':
+    case 'V': case 'W': case 'X': case 'Y': case 'Z':
+      return (char)(ch + ('a' - 'A'));
+
+    case 0x00: case 0x01: case 0x02: case 0x03: case 0x04: case 0x05:
+    case 0x06: case 0x07: case 0x08: case 0x09: case 0x0A: case 0x0B:
+    case 0x0C: case 0x0D: case 0x0E: case 0x0F: case 0x10: case 0x11:
+    case 0x12: case 0x13: case 0x14: case 0x15: case 0x16: case 0x17:
+    case 0x18: case 0x19: case 0x1A: case 0x1B: case 0x1C: case 0x1D:
+    case 0x1E: case 0x1F: case 0x20: case 0x21: case 0x22: case 0x23:
+    case 0x24: case 0x25: case 0x26: case 0x27: case 0x28: case 0x29:
+    case 0x2A: case 0x2B: case 0x2C: case 0x2E: case 0x2F: case 0x3A:
+    case 0x3B: case 0x3C: case 0x3D: case 0x3E: case 0x3F: case 0x40:
+    case 0x5B: case 0x5C: case 0x5D: case 0x5E: case 0x5F: case 0x60:
+    case 0x7B: case 0x7C: case 0x7D: case 0x7E: case 0x7F:
+      *valid = false;
+      return 0;
+
+    default:
+      return ch;
+  }
+}
+
+}  // namespace buzz