1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
;;; mastodon-http.el --- HTTP request/response functions for mastodon.el -*- lexical-binding: t -*-
;; Copyright (C) 2017-2019 Johnson Denen
;; Author: Johnson Denen <johnson.denen@gmail.com>
;; Version: 0.9.0
;; Package-Requires: ((emacs "24.4"))
;; Homepage: https://github.com/jdenen/mastodon.el
;; This file is not part of GNU Emacs.
;; This file is part of mastodon.el.
;; mastodon.el is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; mastodon.el is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with mastodon.el. If not, see <http://www.gnu.org/licenses/>.
;;; Commentary:
;; mastodon-http.el provides HTTP request/response functions.
;;; Code:
(require 'json)
(require 'request) ; for attachments upload
(defvar mastodon-instance-url)
(autoload 'mastodon-auth--access-token "mastodon-auth")
(defvar mastodon-http--api-version "v1")
(defconst mastodon-http--timeout 5
"HTTP request timeout, in seconds. Has no effect on Emacs < 26.1.")
(defun mastodon-http--api (endpoint)
"Return Mastondon API URL for ENDPOINT."
(concat mastodon-instance-url "/api/"
mastodon-http--api-version "/" endpoint))
(defun mastodon-http--response ()
"Capture response buffer content as string."
(with-current-buffer (current-buffer)
(buffer-substring-no-properties (point-min) (point-max))))
(defun mastodon-http--response-body (pattern)
"Return substring matching PATTERN from `mastodon-http--response'."
(let ((resp (mastodon-http--response)))
(string-match pattern resp)
(match-string 0 resp)))
(defun mastodon-http--status ()
"Return HTTP Response Status Code from `mastodon-http--response'."
(let* ((status-line (mastodon-http--response-body "^HTTP/1.*$")))
(string-match "[0-9][0-9][0-9]" status-line)
(match-string 0 status-line)))
(defun mastodon-http--triage (response success)
"Determine if RESPONSE was successful. Call SUCCESS if successful.
Open RESPONSE buffer if unsuccessful."
(let ((status (with-current-buffer response
(mastodon-http--status))))
(if (string-prefix-p "2" status)
(funcall success)
(switch-to-buffer response))))
(defun mastodon-http--post (url args headers &optional unauthenticed-p)
"POST synchronously to URL with ARGS and HEADERS.
Authorization header is included by default unless UNAUTHENTICED-P is non-nil."
(let ((url-request-method "POST")
(url-request-data
(when args
(mapconcat (lambda (arg)
(concat (url-hexify-string (car arg))
"="
(url-hexify-string (cdr arg))))
args
"&")))
(url-request-extra-headers
(append
(unless unauthenticed-p
`(("Authorization" . ,(concat "Bearer " (mastodon-auth--access-token)))))
headers)))
(with-temp-buffer
(if (< (cdr (func-arity 'url-retrieve-synchronously)) 4)
(url-retrieve-synchronously url)
(url-retrieve-synchronously url nil nil mastodon-http--timeout)))))
(defun mastodon-http--get (url)
"Make GET request to URL.
Pass response buffer to CALLBACK function."
(let ((url-request-method "GET")
(url-request-extra-headers
`(("Authorization" . ,(concat "Bearer "
(mastodon-auth--access-token))))))
(if (< (cdr (func-arity 'url-retrieve-synchronously)) 4)
(url-retrieve-synchronously url)
(url-retrieve-synchronously url nil nil mastodon-http--timeout))))
(defun mastodon-http--delete (url)
"Make DELETE request to URL."
(let ((url-request-method "DELETE")
(url-request-extra-headers
`(("Authorization" . ,(concat "Bearer "
(mastodon-auth--access-token))))))
(with-temp-buffer
(url-retrieve-synchronously url))))
(defun mastodon-http--get-json (url)
"Make GET request to URL. Return JSON response."
(with-current-buffer (mastodon-http--get url)
(mastodon-http--process-json)))
(defun mastodon-http--process-json ()
"Process JSON response."
(goto-char (point-min))
(re-search-forward "^$" nil 'move)
(let ((json-string
(decode-coding-string
(buffer-substring-no-properties (point) (point-max))
'utf-8)))
(kill-buffer)
(json-read-from-string json-string)))
;; Asynchronous functions
(defun mastodon-http--get-async (url &optional callback &rest cbargs)
"Make GET request to URL.
Pass response buffer to CALLBACK function with args CBARGS."
(let ((url-request-method "GET")
(url-request-extra-headers
`(("Authorization" . ,(concat "Bearer "
(mastodon-auth--access-token))))))
(url-retrieve url callback cbargs mastodon-http--timeout)))
(defun mastodon-http--get-json-async (url &optional callback &rest args)
"Make GET request to URL. Call CALLBACK with json-vector and ARGS."
(mastodon-http--get-async
url
(lambda (status)
(apply callback (mastodon-http--process-json) args))))
(defun mastodon-http--post-async (url args headers &optional callback &rest cbargs)
"POST asynchronously to URL with ARGS and HEADERS.
Authorization header is included by default unless UNAUTHENTICED-P is non-nil."
(let ((url-request-method "POST")
(request-timeout 5)
(url-request-data
(when args
(mapconcat (lambda (arg)
(concat (url-hexify-string (car arg))
"="
(url-hexify-string (cdr arg))))
args
"&")))
(url-request-extra-headers
(append `(("Authorization" . ,(concat "Bearer " (mastodon-auth--access-token))))
headers)))
(with-temp-buffer
(url-retrieve url callback cbargs mastodon-http--timeout))))
;; TODO: test for curl first?
(defun mastodon-http--post-media-attachment (url filename caption)
"Make a POST request to upload file FILENAME with CAPTION to the server's media URL.
The upload is asynchronous. On succeeding, `mastodon-toot--media-attachment-ids' is set to the id(s) of the item uploaded, `mastodon-toot--media-attachments' is set to t, and `mastodon-toot--update-status-fields' is run."
(let* ((file (file-name-nondirectory filename))
(request-backend 'curl)
(response
(request
url
:type "POST"
:params `(("description" . ,caption))
:files `(("file" . (,file :file ,filename
:mime-type "multipart/form-data")))
:parser 'json-read
:headers `(("Authorization" . ,(concat "Bearer "
(mastodon-auth--access-token))))
:sync nil
:success (cl-function
(lambda (&key data &allow-other-keys)
(when data
(progn
(push (cdr (assoc 'id data))
mastodon-toot--media-attachment-ids) ; add ID to list
(push file mastodon-toot--media-attachment-filenames)
(message "%s file %s with id %S and caption '%s' uploaded!"
(capitalize (cdr (assoc 'type data)))
file
(cdr (assoc 'id data))
(cdr (assoc 'description data)))
(mastodon-toot--update-status-fields)))))
:error (cl-function
(lambda (&key error-thrown &allow-other-keys)
(message "Got error: %s" error-thrown)))
)))
(pcase (request-response-status-code response)
(200
(request-response-data response)
))))
(provide 'mastodon-http)
;;; mastodon-http.el ends here
|
