Mercurial > octave
annotate libinterp/corefcn/urlwrite.cc @ 33639:65b1cf6aa60a bytecode-interpreter tip
maint: Merge default to bytecode-interpreter
author | Arun Giridhar <arungiridhar@gmail.com> |
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date | Mon, 03 Jun 2024 14:38:47 -0400 |
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1 //////////////////////////////////////////////////////////////////////// |
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2 // |
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3 // Copyright (C) 2006-2024 The Octave Project Developers |
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4 // |
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5 // See the file COPYRIGHT.md in the top-level directory of this |
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6 // distribution or <https://octave.org/copyright/>. |
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7 // |
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8 // This file is part of Octave. |
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9 // |
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10 // Octave is free software: you can redistribute it and/or modify it |
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11 // under the terms of the GNU General Public License as published by |
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12 // the Free Software Foundation, either version 3 of the License, or |
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13 // (at your option) any later version. |
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14 // |
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15 // Octave is distributed in the hope that it will be useful, but |
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of |
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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18 // GNU General Public License for more details. |
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19 // |
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20 // You should have received a copy of the GNU General Public License |
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21 // along with Octave; see the file COPYING. If not, see |
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22 // <https://www.gnu.org/licenses/>. |
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23 // |
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24 //////////////////////////////////////////////////////////////////////// |
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26 #if defined (HAVE_CONFIG_H) |
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27 # include "config.h" |
6043 | 28 #endif |
29 | |
30 #include <string> | |
31 #include <fstream> | |
32 #include <iomanip> | |
33 | |
9880 | 34 #include "dir-ops.h" |
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35 #include "file-ops.h" |
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36 #include "file-stat.h" |
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37 #include "lo-sysdep.h" |
6043 | 38 #include "oct-env.h" |
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39 #include "oct-handle.h" |
9880 | 40 #include "glob-match.h" |
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41 #include "url-transfer.h" |
6043 | 42 |
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43 #include "defun.h" |
6043 | 44 #include "error.h" |
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45 #include "interpreter.h" |
9880 | 46 #include "oct-map.h" |
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47 #include "oct-refcount.h" |
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48 #include "ov-cell.h" |
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49 #include "ov-classdef.h" |
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50 #include "ovl.h" |
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51 #include "pager.h" |
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52 #include "unwind-prot.h" |
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53 #include "url-handle-manager.h" |
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54 |
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55 OCTAVE_BEGIN_NAMESPACE(octave) |
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56 |
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57 DEFUN (urlwrite, args, nargout, |
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58 doc: /* -*- texinfo -*- |
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59 @deftypefn {} {} urlwrite (@var{url}, @var{localfile}) |
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60 @deftypefnx {} {@var{f} =} urlwrite (@var{url}, @var{localfile}) |
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61 @deftypefnx {} {[@var{f}, @var{success}] =} urlwrite (@var{url}, @var{localfile}) |
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62 @deftypefnx {} {[@var{f}, @var{success}, @var{message}] =} urlwrite (@var{url}, @var{localfile}) |
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63 Download a remote file specified by its @var{url} and save it as |
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64 @var{localfile}. |
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65 |
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66 For example: |
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67 |
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68 @example |
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69 @group |
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70 urlwrite ("http://ftp.octave.org/pub/README", |
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71 "README.txt"); |
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72 @end group |
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73 @end example |
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74 |
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75 The full path of the downloaded file is returned in @var{f}. |
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76 |
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77 The variable @var{success} is 1 if the download was successful, |
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78 otherwise it is 0 in which case @var{message} contains an error message. |
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79 |
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80 If no output argument is specified and an error occurs, then the error is |
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81 signaled through Octave's error handling mechanism. |
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82 |
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83 This function uses libcurl. The curl library supports, among others, the HTTP, |
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84 FTP, and FILE protocols. Username and password may be specified in the URL, |
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85 for example: |
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86 |
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87 @example |
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88 @group |
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89 urlwrite ("http://username:password@@example.com/file.txt", |
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90 "file.txt"); |
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91 @end group |
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92 @end example |
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93 |
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94 GET and POST requests can be specified by @var{method} and @var{param}. |
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95 The parameter @var{method} is either @samp{get} or @samp{post} and |
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96 @var{param} is a cell array of parameter and value pairs. |
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97 For example: |
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98 |
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99 @example |
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100 @group |
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101 urlwrite ("http://www.google.com/search", "search.html", |
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102 "get", @{"query", "octave"@}); |
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103 @end group |
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104 @end example |
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105 @seealso{urlread} |
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106 @end deftypefn */) |
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108 int nargin = args.length (); | |
109 | |
110 // verify arguments | |
111 if (nargin != 2 && nargin != 4) | |
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112 print_usage (); |
6043 | 113 |
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114 std::string url = args(0).xstring_value ("urlwrite: URL must be a string"); |
6043 | 115 |
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116 // name to store the file if download is successful |
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117 std::string filename = args(1).xstring_value ("urlwrite: LOCALFILE must be a string"); |
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118 |
6043 | 119 std::string method; |
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120 Array<std::string> param; |
6043 | 121 |
122 if (nargin == 4) | |
123 { | |
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124 method = args(2).xstring_value ("urlwrite: METHOD must be a string"); |
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126 if (method != "get" && method != "post") |
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127 error (R"(urlwrite: METHOD must be "get" or "post")"); |
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129 param = args(3).xcellstr_value ("urlwrite: parameters (PARAM) for get and post requests must be given as a cell array of strings"); |
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131 if (param.numel () % 2 == 1) |
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132 error ("urlwrite: number of elements in PARAM must be even"); |
6043 | 133 } |
134 | |
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135 // The file should only be deleted if it doesn't initially exist, we |
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136 // create it, and the download fails. We use unwind_protect to do |
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137 // it so that the deletion happens no matter how we exit the function. |
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138 |
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139 std::ofstream ofile = |
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140 sys::ofstream (filename.c_str (), std::ios::out | std::ios::binary); |
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143 error ("urlwrite: unable to open file"); |
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145 int(*unlink_fptr)(const std::string&) = sys::unlink; |
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146 unwind_action_safe unlink_action (unlink_fptr, filename); |
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148 url_transfer url_xfer (url, ofile); |
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149 |
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150 octave_value_list retval; |
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152 if (! url_xfer.is_valid ()) |
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153 error ("support for URL transfers was disabled when Octave was built"); |
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154 |
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155 url_xfer.http_action (param, method); |
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156 |
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157 ofile.close (); |
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158 |
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159 if (url_xfer.good ()) |
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160 unlink_action.discard (); |
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161 |
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162 if (nargout > 0) |
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163 { |
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164 if (url_xfer.good ()) |
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165 retval = ovl (sys::env::make_absolute (filename), true, ""); |
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166 else |
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167 retval = ovl ("", false, url_xfer.lasterror ()); |
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168 } |
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169 |
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170 if (nargout < 2 && ! url_xfer.good ()) |
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171 error ("urlwrite: %s", url_xfer.lasterror ().c_str ()); |
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173 return retval; | |
174 } | |
175 | |
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176 DEFUN (urlread, args, nargout, |
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177 doc: /* -*- texinfo -*- |
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178 @deftypefn {} {@var{s} =} urlread (@var{url}) |
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179 @deftypefnx {} {[@var{s}, @var{success}] =} urlread (@var{url}) |
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180 @deftypefnx {} {[@var{s}, @var{success}, @var{message}] =} urlread (@var{url}) |
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181 @deftypefnx {} {[@dots{}] =} urlread (@var{url}, @var{method}, @var{param}) |
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182 Download a remote file specified by its @var{url} and return its content |
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183 in string @var{s}. |
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184 |
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185 For example: |
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186 |
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187 @example |
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188 s = urlread ("http://ftp.octave.org/pub/README"); |
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189 @end example |
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190 |
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191 The variable @var{success} is 1 if the download was successful, |
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192 otherwise it is 0 in which case @var{message} contains an error |
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193 message. |
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194 |
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195 If no output argument is specified and an error occurs, then the error is |
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196 signaled through Octave's error handling mechanism. |
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197 |
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198 This function uses libcurl. The curl library supports, among others, the HTTP, |
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199 FTP, and FILE protocols. Username and password may be specified in the URL@. |
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200 For example: |
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201 |
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202 @example |
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203 s = urlread ("http://user:password@@example.com/file.txt"); |
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204 @end example |
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205 |
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206 GET and POST requests can be specified by @var{method} and @var{param}. |
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207 The parameter @var{method} is either @samp{get} or @samp{post} and |
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208 @var{param} is a cell array of parameter and value pairs. |
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209 For example: |
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210 |
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211 @example |
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212 @group |
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213 s = urlread ("http://www.google.com/search", |
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214 "get", @{"query", "octave"@}); |
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215 @end group |
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216 @end example |
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217 @seealso{urlwrite} |
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218 @end deftypefn */) |
6043 | 219 { |
220 int nargin = args.length (); | |
221 | |
222 // verify arguments | |
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223 if (nargin != 1 && nargin != 3) |
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224 print_usage (); |
6043 | 225 |
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226 std::string url = args(0).xstring_value ("urlread: URL must be a string"); |
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227 |
6043 | 228 std::string method; |
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229 Array<std::string> param; |
6043 | 230 |
231 if (nargin == 3) | |
232 { | |
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233 method = args(1).xstring_value ("urlread: METHOD must be a string"); |
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235 if (method != "get" && method != "post") |
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236 error (R"(urlread: METHOD must be "get" or "post")"); |
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238 param = args(2).xcellstr_value ("urlread: parameters (PARAM) for get and post requests must be given as a cell array of strings"); |
6043 | 239 |
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240 if (param.numel () % 2 == 1) |
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241 error ("urlread: number of elements in PARAM must be even"); |
6043 | 242 } |
243 | |
6986 | 244 std::ostringstream buf; |
6043 | 245 |
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246 url_transfer url_xfer = url_transfer (url, buf); |
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247 |
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248 if (! url_xfer.is_valid ()) |
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249 error ("support for URL transfers was disabled when Octave was built"); |
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250 |
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251 url_xfer.http_action (param, method); |
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252 |
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253 if (nargout < 2 && ! url_xfer.good ()) |
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254 error ("urlread: %s", url_xfer.lasterror ().c_str ()); |
6043 | 255 |
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256 octave_value_list retval (std::max (1, std::min (nargout, 3))); |
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257 |
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258 retval(0) = buf.str (); |
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259 if (nargout > 1) |
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260 retval(1) = url_xfer.good (); |
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261 if (nargout > 2) |
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262 retval(2) = url_xfer.good () ? "" : url_xfer.lasterror (); |
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263 |
6043 | 264 return retval; |
265 } | |
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267 DEFUN (__restful_service__, args, nargout, |
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268 doc: /* -*- texinfo -*- |
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269 @deftypefn {} {@var{response} =} __restful_service__ (@var{url}, @var{param}, @var{weboptions}) |
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270 Undocumented internal function. |
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271 @end deftypefn */) |
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272 { |
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273 int nargin = args.length (); |
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274 |
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275 if (nargin < 1) |
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276 print_usage (); |
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277 |
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278 std::string url = args(0).xstring_value ("__restful_service__: URL must be a string"); |
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279 |
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280 std::ostringstream content; |
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281 |
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282 url_transfer url_xfer (url, content); |
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283 |
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284 if (! url_xfer.is_valid ()) |
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285 error ("support for URL transfers was disabled when Octave was built"); |
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286 |
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287 Array<std::string> param = args(1).cellstr_value (); |
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288 |
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289 std::string data, method; |
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290 |
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291 struct weboptions options; |
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292 |
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293 cdef_object object |
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294 = args (nargin - 1).classdef_object_value () -> get_object (); |
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295 |
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296 // We could've used object.map_value () instead to return a map but that |
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297 // shows a warning about about overriding access restrictions. |
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298 // Nevertheless, we are keeping checking that here if the keys are not |
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299 // equal to "delete" and "display", getting away with the warning. |
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300 string_vector keys = object.map_keys (); |
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301 |
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302 for (int i = 0; i < keys.numel (); i++) |
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303 { |
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304 if (keys(i) == "Timeout") |
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305 { |
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306 float timeout = object.get (keys(i)).float_value (); |
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307 options.Timeout = static_cast<long> (timeout * 1000); |
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308 } |
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309 |
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310 if (keys(i) == "HeaderFields") |
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311 { |
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312 options.HeaderFields = object.get (keys(i)).cellstr_value (); |
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313 } |
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314 |
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315 // FIXME: 'delete' and 'display', auto-generated, probably by cdef_object |
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316 // class? Remaining fields have already been adjusted elsewhere in the |
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317 // m-script. Set 'value' as the Value of the Key wherever it's a string. |
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318 if (keys(i) != "Timeout" && keys(i) != "HeaderFields" |
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319 && keys(i) != "delete" && keys(i) != "display") |
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320 { |
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321 std::string value = object.get (keys(i)).string_value (); |
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322 |
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323 if (keys(i) == "UserAgent") |
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324 options.UserAgent = value; |
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325 |
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326 if (keys(i) == "Username") |
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327 options.Username = value; |
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328 |
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329 if (keys(i) == "Password") |
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330 options.Password = value; |
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331 |
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332 if (keys(i) == "ContentReader") |
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333 // Unimplemented. Only for MATLAB compatibility. |
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334 options.ContentReader = ""; |
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335 |
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336 if (keys(i) == "RequestMethod") |
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337 method = value; |
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338 |
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339 if (keys(i) == "ArrayFormat") |
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340 options.ArrayFormat = value; |
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341 |
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342 if (keys(i) == "CertificateFilename") |
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343 options.CertificateFilename = ""; |
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344 } |
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345 } |
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346 |
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347 url_xfer.set_weboptions (options); |
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348 |
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349 url_xfer.http_action (param, method); |
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350 |
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351 if (nargout < 2 && ! url_xfer.good ()) |
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352 error ("__restful_service__: %s", url_xfer.lasterror ().c_str ()); |
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353 |
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354 return ovl (content.str ()); |
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355 } |
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356 |
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357 OCTAVE_END_NAMESPACE(octave) |