Correctly talk to VMS servers (translate UNIX paths to VMS and vice versa).

net/ftp/ftp_util.cc

+// Copyright (c) 2009 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "net/ftp/ftp_util.h"
+
+#include <vector>
+
+#include "base/logging.h"
+#include "base/string_tokenizer.h"
+#include "base/string_util.h"
+
+// For examples of Unix<->VMS path conversions, see the unit test file. On VMS
+// a path looks differently depending on whether it's a file or directory.
+
+namespace net {
+
+// static
+std::string FtpUtil::UnixFilePathToVMS(const std::string& unix_path) {
+  if (unix_path.empty())
+    return std::string();
+
+  StringTokenizer tokenizer(unix_path, "/");
+  std::vector<std::string> tokens;
+  while (tokenizer.GetNext())
+    tokens.push_back(tokenizer.token());
+
+  if (unix_path[0] == '/') {
+    // It's an absolute path.
+
+    if (tokens.empty()) {
+      DCHECK_EQ(1U, unix_path.length());
+      return "[]";
+    }
+
+    if (tokens.size() == 1)
+      return unix_path.substr(1);  // Drop the leading slash.
+
+    std::string result(tokens[0] + ":[");
+    if (tokens.size() == 2) {
+      // Don't ask why, it just works that way on VMS.
+      result.append("000000");
+    } else {
+      result.append(tokens[1]);
+      for (size_t i = 2; i < tokens.size() - 1; i++)
+        result.append("." + tokens[i]);
+    }
+    result.append("]" + tokens[tokens.size() - 1]);
+    return result;
+  }
+
+  if (tokens.size() == 1)
+    return unix_path;
+
+  std::string result("[");
+  for (size_t i = 0; i < tokens.size() - 1; i++)
+    result.append("." + tokens[i]);
+  result.append("]" + tokens[tokens.size() - 1]);
+  return result;
+}
+
+// static
+std::string FtpUtil::UnixDirectoryPathToVMS(const std::string& unix_path) {
+  if (unix_path.empty())
+    return std::string();
+
+  std::string path(unix_path);
+
+  if (path[path.length() - 1] != '/')
+    path.append("/");
+
+  // Reuse logic from UnixFilePathToVMS by appending a fake file name to the
+  // real path and removing it after conversion.
+  path.append("x");
+  path = UnixFilePathToVMS(path);
+  return path.substr(0, path.length() - 1);
+}
+
+// static
+std::string FtpUtil::VMSPathToUnix(const std::string& vms_path) {
+  if (vms_path.empty())
+    return ".";
+
+  if (vms_path == "[]")
+    return "/";
+
+  std::string result(vms_path);
+  if (vms_path[0] == '[') {
+    // It's a relative path.
+    ReplaceFirstSubstringAfterOffset(&result, 0, "[.", "");
+  } else {
+    // It's an absolute path.
+    result.insert(0, "/");
+    ReplaceSubstringsAfterOffset(&result, 0, ":[000000]", "/");
+    ReplaceSubstringsAfterOffset(&result, 0, ":[", "/");
+  }
+  std::replace(result.begin(), result.end(), '.', '/');
+  std::replace(result.begin(), result.end(), ']', '/');
+
+  // Make sure the result doesn't end with a slash.
+  if (result[result.length() - 1] == '/')
+    result = result.substr(0, result.length() - 1);
+
+  return result;
+}
+
+}  // namespace