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1 ;;; Simple POP (RFC 1460) client for VM
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2 ;;; Copyright (C) 1993, 1994 Kyle E. Jones
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3 ;;;
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4 ;;; This program is free software; you can redistribute it and/or modify
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5 ;;; it under the terms of the GNU General Public License as published by
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6 ;;; the Free Software Foundation; either version 1, or (at your option)
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7 ;;; any later version.
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8 ;;;
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9 ;;; This program is distributed in the hope that it will be useful,
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10 ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 ;;; GNU General Public License for more details.
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13 ;;;
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14 ;;; You should have received a copy of the GNU General Public License
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15 ;;; along with this program; if not, write to the Free Software
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16 ;;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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17
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18 (provide 'vm-pop)
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19
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20 ;; Nothing fancy here.
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21 ;; Our goal is to drag the mail from the POP maildrop to the crash box.
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22 ;; just as if we were using movemail on a spool file.
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23 (defun vm-pop-move-mail (source destination)
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24 (let ((process nil)
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25 (folder-type vm-folder-type)
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26 (saved-password t)
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24
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27 (m-per-session vm-pop-messages-per-session)
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28 (b-per-session vm-pop-bytes-per-session)
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0
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29 (handler (and (fboundp 'find-file-name-handler)
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30 (condition-case ()
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31 (find-file-name-handler source 'vm-pop-move-mail)
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32 (wrong-number-of-arguments
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33 (find-file-name-handler source)))))
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34 (popdrop (vm-safe-popdrop-string source))
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24
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35 mailbox-count mailbox-size message-size response
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36 n retrieved retrieved-bytes process-buffer)
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0
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37 (unwind-protect
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38 (catch 'done
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39 (if handler
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40 (throw 'done
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41 (funcall handler 'vm-pop-move-mail source destination)))
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24
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42 (setq process (vm-pop-make-session source))
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43 (or process (throw 'done nil))
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44 (setq process-buffer (process-buffer process))
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45 (save-excursion
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46 (set-buffer process-buffer)
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47 (setq vm-folder-type (or folder-type vm-default-folder-type))
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48 ;; find out how many messages are in the box.
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49 (vm-pop-send-command process "STAT")
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50 (setq response (vm-pop-read-stat-response process)
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51 mailbox-count (nth 0 response)
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52 mailbox-size (nth 1 response))
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53 ;; forget it if the command fails
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54 ;; or if there are no messages present.
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55 (if (or (null mailbox-count)
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56 (< mailbox-count 1))
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57 (throw 'done nil))
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58 ;; loop through the maildrop retrieving and deleting
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59 ;; messages as we go.
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60 (setq n 1 retrieved 0 retrieved-bytes 0)
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61 (while (and (<= n mailbox-count)
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62 (or (not (natnump m-per-session))
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63 (< retrieved m-per-session))
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64 (or (not (natnump b-per-session))
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65 (< retrieved-bytes b-per-session)))
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66 (if (or vm-pop-max-message-size
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67 b-per-session)
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68 (progn
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69 (vm-pop-send-command process (format "LIST %d" n))
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70 (setq message-size
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71 (vm-pop-read-list-response process))))
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72 (if (and (integerp vm-pop-max-message-size)
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73 (> message-size vm-pop-max-message-size)
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74 (progn
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75 (setq response
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76 (if vm-pop-ok-to-ask
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77 (vm-pop-ask-about-large-message process
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78 message-size
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79 n)
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80 'skip))
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81 (not (eq response 'retrieve))))
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82 (if (eq response 'delete)
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83 (progn
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84 (message "Deleting message %d..." n)
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85 (vm-pop-send-command process (format "DELE %d" n))
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86 (and (null (vm-pop-read-response process))
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87 (throw 'done (not (equal retrieved 0)))))
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88 (if vm-pop-ok-to-ask
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89 (message "Skipping message %d..." n)
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90 (message "Skipping message %d in %s, too large (%d > %d)..."
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91 n popdrop message-size vm-pop-max-message-size)))
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92 (message "Retrieving message %d (of %d) from %s..."
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93 n mailbox-count popdrop)
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94 (vm-pop-send-command process (format "RETR %d" n))
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95 (and (null (vm-pop-read-response process))
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96 (throw 'done (not (equal retrieved 0))))
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97 (and (null (vm-pop-retrieve-to-crashbox process destination))
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98 (throw 'done (not (equal retrieved 0))))
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99 (vm-increment retrieved)
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100 (and b-per-session
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101 (setq retrieved-bytes (+ retrieved-bytes message-size)))
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102 (vm-pop-send-command process (format "DELE %d" n))
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103 ;; DELE can't fail but Emacs or this code might
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104 ;; blow a gasket and spew filth down the
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105 ;; connection, so...
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106 (and (null (vm-pop-read-response process))
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107 (throw 'done (not (equal retrieved 0)))))
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108 (vm-increment n))
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109 (not (equal retrieved 0)) ))
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110 (if process
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111 (vm-pop-end-session process)))))
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112
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113 (defun vm-pop-check-mail (source)
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114 (let ((process nil)
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115 (handler (and (fboundp 'find-file-name-handler)
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116 (condition-case ()
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117 (find-file-name-handler source 'vm-pop-check-mail)
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118 (wrong-number-of-arguments
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119 (find-file-name-handler source)))))
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120 response)
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121 (unwind-protect
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122 (save-excursion
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123 (catch 'done
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124 (if handler
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125 (throw 'done
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126 (funcall handler 'vm-pop-check-mail source)))
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127 (setq process (vm-pop-make-session source))
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128 (or process (throw 'done nil))
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129 (set-buffer (process-buffer process))
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130 (vm-pop-send-command process "STAT")
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131 (setq response (vm-pop-read-stat-response process))
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132 (if (null response)
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133 nil
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134 (not (equal 0 (car response))))))
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135 (and process (vm-pop-end-session process)))))
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136
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137 (defun vm-pop-make-session (source)
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138 (let ((process-to-shutdown nil)
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139 process
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140 (saved-password t)
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141 (popdrop (vm-safe-popdrop-string source))
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142 greeting timestamp
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143 host port auth user pass source-list process-buffer)
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144 (unwind-protect
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145 (catch 'done
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0
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146 ;; parse the maildrop
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147 (setq source-list (vm-parse source "\\([^:]+\\):?")
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148 host (nth 0 source-list)
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149 port (nth 1 source-list)
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150 auth (nth 2 source-list)
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151 user (nth 3 source-list)
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152 pass (nth 4 source-list))
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153 ;; carp if parts are missing
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154 (if (null host)
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155 (error "No host in POP maildrop specification, \"%s\""
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156 source))
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157 (if (null port)
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158 (error "No port in POP maildrop specification, \"%s\""
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159 source))
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160 (if (string-match "^[0-9]+$" port)
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161 (setq port (string-to-int port)))
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162 (if (null auth)
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163 (error
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164 "No authentication method in POP maildrop specification, \"%s\""
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165 source))
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166 (if (null user)
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167 (error "No user in POP maildrop specification, \"%s\""
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168 source))
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169 (if (null pass)
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170 (error "No password in POP maildrop specification, \"%s\""
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171 source))
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172 (if (equal pass "*")
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173 (progn
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174 (setq pass (car (cdr (assoc source vm-pop-passwords))))
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175 (if (null pass)
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24
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176 (if (null vm-pop-ok-to-ask)
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177 (progn (message "Need password for %s" popdrop)
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178 (throw 'done nil))
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179 (setq pass
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180 (vm-read-password
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181 (format "POP password for %s: "
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182 popdrop))
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183 vm-pop-passwords (cons (list source pass)
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184 vm-pop-passwords)
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185 saved-password t)))))
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0
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186 ;; get the trace buffer
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187 (setq process-buffer
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188 (get-buffer-create (format "trace of POP session to %s" host)))
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24
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189 ;; Tell XEmacs/MULE not to mess with the text.
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26
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190 (and (vm-xemacs-mule-p)
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191 (set-file-coding-system 'binary t))
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0
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192 ;; clear the trace buffer of old output
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193 (save-excursion
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194 (set-buffer process-buffer)
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195 (erase-buffer))
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196 ;; open the connection to the server
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197 (setq process (open-network-stream "POP" process-buffer host port))
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198 (and (null process) (throw 'done nil))
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24
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199 (process-kill-without-query process)
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0
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200 (save-excursion
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201 (set-buffer process-buffer)
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202 (make-local-variable 'vm-pop-read-point)
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203 (setq vm-pop-read-point (point-min))
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204 (if (null (setq greeting (vm-pop-read-response process t)))
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205 (progn (delete-process process)
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206 (throw 'done nil)))
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207 (setq process-to-shutdown process)
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208 ;; authentication
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209 (cond ((equal auth "pass")
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210 (vm-pop-send-command process (format "USER %s" user))
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211 (and (null (vm-pop-read-response process))
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212 (throw 'done nil))
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213 (vm-pop-send-command process (format "PASS %s" pass))
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214 (if (null (vm-pop-read-response process))
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215 (progn
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216 (if saved-password
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217 (setq vm-pop-passwords
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218 (delete (list source pass)
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219 vm-pop-passwords)))
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220 (throw 'done nil))))
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221 ((equal auth "rpop")
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222 (vm-pop-send-command process (format "USER %s" user))
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223 (and (null (vm-pop-read-response process))
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224 (throw 'done nil))
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225 (vm-pop-send-command process (format "RPOP %s" pass))
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226 (and (null (vm-pop-read-response process))
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227 (throw 'done nil)))
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228 ((equal auth "apop")
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229 (setq timestamp (vm-parse greeting "[^<]+\\(<[^>]+>\\)")
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230 timestamp (car timestamp))
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231 (if (null timestamp)
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232 (progn
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233 (goto-char (point-max))
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24
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234 (insert-before-markers "<<< ooops, no timestamp found in greeting! >>>\n")
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235 (throw 'done nil)))
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236 (vm-pop-send-command
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237 process
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238 (format "APOP %s %s"
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239 user
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240 (vm-pop-md5 (concat timestamp pass))))
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241 (and (null (vm-pop-read-response process))
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242 (throw 'done nil)))
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243 (t (error "Don't know how to authenticate with %s" auth)))
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24
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244 (setq process-to-shutdown nil)
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245 process ))
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246 (if process-to-shutdown
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247 (vm-pop-end-session process-to-shutdown)))))
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0
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248
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24
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249 (defun vm-pop-end-session (process)
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250 (save-excursion
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251 (set-buffer (process-buffer process))
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24
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252 (vm-pop-send-command process "QUIT")
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253 (vm-pop-read-response process)
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254 (if (fboundp 'add-async-timeout)
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255 (add-async-timeout 2 'delete-process process)
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256 (run-at-time 2 nil 'delete-process process))))
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257
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258 (defun vm-pop-send-command (process command)
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259 (goto-char (point-max))
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260 (if (= (aref command 0) ?P)
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24
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261 (insert-before-markers "PASS <omitted>\r\n")
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262 (insert-before-markers command "\r\n"))
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263 (setq vm-pop-read-point (point))
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264 (process-send-string process command)
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265 (process-send-string process "\r\n"))
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266
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267 (defun vm-pop-read-response (process &optional return-response-string)
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268 (let ((case-fold-search nil)
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269 match-end)
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270 (goto-char vm-pop-read-point)
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271 (while (not (search-forward "\r\n" nil t))
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272 (accept-process-output process)
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273 (goto-char vm-pop-read-point))
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274 (setq match-end (point))
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275 (goto-char vm-pop-read-point)
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276 (if (not (looking-at "+OK"))
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277 (progn (setq vm-pop-read-point match-end) nil)
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278 (setq vm-pop-read-point match-end)
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279 (if return-response-string
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280 (buffer-substring (point) match-end)
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281 t ))))
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282
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24
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283 (defun vm-pop-read-past-dot-sentinel-line (process)
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284 (let ((case-fold-search nil))
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285 (goto-char vm-pop-read-point)
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286 (while (not (search-forward "^.\r\n" nil 0))
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287 (beginning-of-line)
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288 ;; save-excursion doesn't work right
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289 (let ((opoint (point)))
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290 (accept-process-output process)
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291 (goto-char opoint)))
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292 (setq vm-pop-read-point (point))))
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293
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294 (defun vm-pop-read-stat-response (process)
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295 (let ((response (vm-pop-read-response process t))
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296 list)
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297 (setq list (vm-parse response "\\([^ ]+\\) *"))
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298 (list (string-to-int (nth 1 list)) (string-to-int (nth 2 list)))))
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299
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300 (defun vm-pop-read-list-response (process)
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301 (let ((response (vm-pop-read-response process t)))
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302 (string-to-int (nth 2 (vm-parse response "\\([^ ]+\\) *")))))
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303
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304 (defun vm-pop-ask-about-large-message (process size n)
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305 (let ((work-buffer nil)
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306 (pop-buffer (current-buffer))
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307 start end)
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308 (unwind-protect
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309 (save-excursion
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310 (save-window-excursion
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311 (vm-pop-send-command process (format "TOP %d %d" n 0))
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312 (if (vm-pop-read-response process)
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313 (progn
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314 (setq start vm-pop-read-point)
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315 (vm-pop-read-past-dot-sentinel-line process)
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316 (setq end vm-pop-read-point)
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317 (setq work-buffer (generate-new-buffer "*pop-glop*"))
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318 (set-buffer work-buffer)
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319 (insert-buffer-substring pop-buffer start end)
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320 (forward-line -1)
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321 (delete-region (point) (point-max))
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322 (vm-pop-cleanup-region (point-min) (point-max))
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323 (vm-display-buffer work-buffer)
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324 (setq minibuffer-scroll-window (selected-window))
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325 (goto-char (point-min))
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326 (if (re-search-forward "^Received:" nil t)
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327 (progn
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328 (goto-char (match-beginning 0))
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329 (vm-reorder-message-headers
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330 nil vm-visible-headers
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331 vm-invisible-header-regexp)))
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332 (set-window-point (selected-window) (point))))
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333 (if (y-or-n-p (format "Message %d, size = %d, retrieve? " n size))
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334 'retrieve
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335 (if (y-or-n-p (format "Delete message %d from popdrop? " n size))
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336 'delete
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337 'skip))))
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338 (and work-buffer (kill-buffer work-buffer)))))
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0
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339
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340 (defun vm-pop-retrieve-to-crashbox (process crash)
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341 (let ((start vm-pop-read-point) end)
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342 (goto-char start)
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24
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343 (while (not (re-search-forward "^\\.\r\n" nil 0))
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344 (beginning-of-line)
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345 ;; save-excursion doesn't work right
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346 (let ((opoint (point)))
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347 (accept-process-output process)
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348 (goto-char opoint)))
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0
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349 (setq vm-pop-read-point (point-marker))
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350 (goto-char (match-beginning 0))
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351 (setq end (point-marker))
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352 (vm-pop-cleanup-region start end)
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353 ;; Some POP servers strip leading and trailing message
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354 ;; separators, some don't. Figure out what kind we're
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355 ;; talking to and do the right thing.
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356 (if (eq (vm-get-folder-type nil start end) 'unknown)
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357 (progn
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358 (vm-munge-message-separators vm-folder-type start end)
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359 (goto-char start)
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360 ;; avoid the consing and stat() call for all but babyl
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361 ;; files, since this will probably slow things down.
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362 ;; only babyl files have the folder header, and we
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363 ;; should only insert it if the crash box is empty.
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364 (if (and (eq vm-folder-type 'babyl)
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365 (let ((attrs (file-attributes crash)))
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366 (or (null attrs) (equal 0 (nth 7 attrs)))))
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367 (let ((opoint (point)))
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368 (vm-convert-folder-header nil vm-folder-type)
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369 ;; if start is a marker, then it was moved
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370 ;; forward by the insertion. restore it.
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371 (setq start opoint)
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372 (goto-char start)
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373 (vm-skip-past-folder-header)))
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374 (insert (vm-leading-message-separator))
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375 ;; this will not find the trailing message separator but
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376 ;; for the Content-Length stuff counting from eob is
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377 ;; the same thing in this case.
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378 (vm-convert-folder-type-headers nil vm-folder-type)
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379 (goto-char end)
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380 (insert-before-markers (vm-trailing-message-separator))))
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20
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381 ;; Set file type to binary for DOS/Windows. I don't know if
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382 ;; this is correct to do or not; it depends on whether the
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383 ;; the CRLF or the LF newline convention is used on the inbox
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384 ;; associated with this crashbox. This setting assumes the LF
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385 ;; newline convention is used.
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386 (let ((buffer-file-type t))
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387 (write-region start end crash t 0))
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0
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388 (delete-region start end)
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389 t ))
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390
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391 (defun vm-pop-cleanup-region (start end)
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392 (setq end (vm-marker end))
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393 (save-excursion
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394 (goto-char start)
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395 ;; CRLF -> LF
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396 (while (and (< (point) end) (search-forward "\r\n" end t))
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397 (replace-match "\n" t t))
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398 (goto-char start)
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399 ;; chop leading dots
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400 (while (and (< (point) end) (re-search-forward "^\\." end t))
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401 (replace-match "" t t)
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402 (forward-char)))
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403 (set-marker end nil))
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404
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405 (defun vm-pop-md5 (string)
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406 (let ((buffer nil))
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407 (unwind-protect
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408 (save-excursion
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409 (setq buffer (generate-new-buffer "*vm-work*"))
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410 (set-buffer buffer)
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411 (insert string)
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412 (call-process-region (point-min) (point-max)
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413 "/bin/sh" t buffer nil
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20
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414 shell-command-switch vm-pop-md5-program)
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0
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415 ;; MD5 digest is 32 chars long
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416 ;; mddriver adds a newline to make neaten output for tty
|
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417 ;; viewing, make sure we leave it behind.
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418 (vm-buffer-substring-no-properties (point-min) (+ (point-min) 32)))
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419 (and buffer (kill-buffer buffer)))))
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