annotate src/lib-imap-storage/imap-msgpart-url.c @ 23017:c1d36f2575c7 default tip

lib-imap: Fix "Don't accept strings with NULs" cherry-pick
author Timo Sirainen <timo.sirainen@open-xchange.com>
date Thu, 29 Aug 2019 09:55:25 +0300
parents cb108f786fb4
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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cb108f786fb4 Updated copyright notices to include the year 2018.
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1 /* Copyright (c) 2013-2018 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "net.h"
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5 #include "istream.h"
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6 #include "message-parser.h"
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7 #include "mail-storage.h"
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8 #include "mail-namespace.h"
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9 #include "imap-url.h"
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10 #include "imap-msgpart.h"
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11 #include "imap-msgpart-url.h"
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12
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13 struct imap_msgpart_url {
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14 char *mailbox;
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15 uint32_t uidvalidity;
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16 uint32_t uid;
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17 char *section;
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18 uoff_t partial_offset, partial_size;
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19
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20 struct imap_msgpart *part;
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21
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22 struct mail_user *user;
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23 struct mailbox *selected_box;
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24 struct mailbox *box;
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25 struct mailbox_transaction_context *trans;
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26 struct mail *mail;
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27
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28 struct imap_msgpart_open_result result;
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29
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30 unsigned int decode_cte_to_binary:1;
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31 };
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32
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33 int imap_msgpart_url_create(struct mail_user *user, const struct imap_url *url,
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34 struct imap_msgpart_url **mpurl_r,
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35 const char **error_r)
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36 {
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37 const char *section = url->section == NULL ? "" : url->section;
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38 struct imap_msgpart_url *mpurl;
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39 struct imap_msgpart *msgpart;
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40
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41 i_assert(url->mailbox != NULL && url->uid != 0 &&
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42 url->search_program == NULL);
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43
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44 if (imap_msgpart_parse(section, &msgpart) < 0) {
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45 *error_r = "Invalid section";
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46 return -1;
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47 }
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48
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49 mpurl = i_new(struct imap_msgpart_url, 1);
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50 mpurl->part = msgpart;
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51 mpurl->user = user;
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52 mpurl->mailbox = i_strdup(url->mailbox);
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53 mpurl->uidvalidity = url->uidvalidity;
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54 mpurl->uid = url->uid;
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55 if (url->section != NULL)
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56 mpurl->section = i_strdup(url->section);
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57 mpurl->partial_offset = url->partial_offset;
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58 mpurl->partial_size = url->partial_size;
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59
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60 imap_msgpart_set_partial(msgpart, url->partial_offset,
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61 url->partial_size == 0 ?
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62 (uoff_t)-1 : url->partial_size);
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63
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64 *mpurl_r = mpurl;
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65 return 0;
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66 }
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67
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68 int imap_msgpart_url_parse(struct mail_user *user, struct mailbox *selected_box,
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69 const char *urlstr, struct imap_msgpart_url **mpurl_r,
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70 const char **error_r)
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71 {
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72 struct mailbox_status box_status;
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73 struct imap_url base_url, *url;
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74 const char *error;
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75
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76 /* build base url */
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77 i_zero(&base_url);
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78 if (selected_box != NULL) {
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79 mailbox_get_open_status(selected_box, STATUS_UIDVALIDITY,
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80 &box_status);
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81 base_url.mailbox = mailbox_get_vname(selected_box);
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82 base_url.uidvalidity = box_status.uidvalidity;
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83 }
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84
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85 /* parse url */
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86 if (imap_url_parse(urlstr, &base_url,
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87 IMAP_URL_PARSE_REQUIRE_RELATIVE, &url, &error) < 0) {
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88 *error_r = t_strconcat("Invalid IMAP URL: ", error, NULL);
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89 return 0;
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90 }
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91 if (url->mailbox == NULL) {
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92 *error_r = "Mailbox-relative IMAP URL, but no mailbox selected";
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93 return 0;
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94 }
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95 if (url->uid == 0 || url->search_program != NULL) {
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96 *error_r = "Invalid messagepart IMAP URL";
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97 return 0;
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98 }
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99 if (imap_msgpart_url_create(user, url, mpurl_r, error_r) < 0)
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100 return -1;
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101 (*mpurl_r)->selected_box = selected_box;
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102 return 1;
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103 }
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104
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105 struct mailbox *imap_msgpart_url_get_mailbox(struct imap_msgpart_url *mpurl)
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106 {
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107 return mpurl->box;
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108 }
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109
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110 int imap_msgpart_url_open_mailbox(struct imap_msgpart_url *mpurl,
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111 struct mailbox **box_r, enum mail_error *error_code_r,
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112 const char **error_r)
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113 {
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114 struct mailbox_status box_status;
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115 enum mailbox_flags flags = MAILBOX_FLAG_READONLY;
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116 struct mail_namespace *ns;
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117 struct mailbox *box;
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118
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119 if (mpurl->box != NULL) {
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120 *box_r = mpurl->box;
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121 *error_code_r = MAIL_ERROR_NONE;
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122 return 1;
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123 }
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124
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125 /* find mailbox namespace */
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126 ns = mail_namespace_find(mpurl->user->namespaces, mpurl->mailbox);
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127
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128 /* open mailbox */
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129 if (mpurl->selected_box != NULL &&
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130 mailbox_equals(mpurl->selected_box, ns, mpurl->mailbox))
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131 box = mpurl->selected_box;
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132 else {
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133 box = mailbox_alloc(ns->list, mpurl->mailbox, flags);
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134 mailbox_set_reason(box, "Read IMAP URL");
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135 }
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136 if (mailbox_open(box) < 0) {
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137 *error_r = mail_storage_get_last_error(mailbox_get_storage(box),
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138 error_code_r);
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139 if (box != mpurl->selected_box)
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140 mailbox_free(&box);
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141 return *error_code_r == MAIL_ERROR_TEMP ? -1 : 0;
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142 }
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143
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144 /* verify UIDVALIDITY */
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145 mailbox_get_open_status(box, STATUS_UIDVALIDITY, &box_status);
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146 if (mpurl->uidvalidity > 0 &&
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147 box_status.uidvalidity != mpurl->uidvalidity) {
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148 *error_r = "Invalid UIDVALIDITY";
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149 *error_code_r = MAIL_ERROR_EXPUNGED;
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150 if (box != mpurl->selected_box)
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151 mailbox_free(&box);
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152 return 0;
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153 }
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154 mpurl->box = box;
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155 *box_r = box;
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156 return 1;
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157 }
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158
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159 int imap_msgpart_url_open_mail(struct imap_msgpart_url *mpurl,
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160 struct mail **mail_r, const char **error_r)
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161 {
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162 struct mailbox_transaction_context *t;
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163 struct mailbox *box;
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164 enum mail_error error_code;
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165 struct mail *mail;
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166 int ret;
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167
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168 if (mpurl->mail != NULL) {
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169 *mail_r = mpurl->mail;
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170 return 1;
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171 }
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172
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173 /* open mailbox if it is not yet open */
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174 if ((ret = imap_msgpart_url_open_mailbox(mpurl, &box, &error_code,
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175 error_r)) <= 0)
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176 return ret;
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177
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178 /* start transaction */
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179 t = mailbox_transaction_begin(box, 0);
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180 mail = mail_alloc(t, MAIL_FETCH_MESSAGE_PARTS |
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181 MAIL_FETCH_IMAP_BODYSTRUCTURE, NULL);
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182
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183 /* find the message */
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184 if (!mail_set_uid(mail, mpurl->uid)) {
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185 *error_r = "Message not found";
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186 mail_free(&mail);
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187 mailbox_transaction_rollback(&t);
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188 return 0;
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189 }
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190
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191 mpurl->trans = t;
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192 mpurl->mail = mail;
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193 *mail_r = mail;
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194 return 1;
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195 }
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196
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197 struct imap_msgpart *
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198 imap_msgpart_url_get_part(struct imap_msgpart_url *mpurl)
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199 {
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200 return mpurl->part;
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201 }
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202
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203 void imap_msgpart_url_set_decode_to_binary(struct imap_msgpart_url *mpurl)
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204 {
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205 imap_msgpart_set_decode_to_binary(mpurl->part);
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206 }
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207
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208 int imap_msgpart_url_read_part(struct imap_msgpart_url *mpurl,
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209 struct imap_msgpart_open_result *result_r,
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210 const char **error_r)
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211 {
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212 struct mail *mail;
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213 int ret;
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214
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215 if (mpurl->result.input != NULL) {
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216 i_stream_seek(mpurl->result.input, 0);
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217 *result_r = mpurl->result;
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218 return 1;
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219 }
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220
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221 /* open mail if it is not yet open */
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222 ret = imap_msgpart_url_open_mail(mpurl, &mail, error_r);
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223 if (ret <= 0)
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224 return ret;
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225
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226 /* open the referenced part as a stream */
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227 ret = imap_msgpart_open(mail, mpurl->part, result_r);
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228 if (ret < 0) {
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229 *error_r = mailbox_get_last_error(mpurl->box, NULL);
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230 return ret;
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231 }
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232
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233 mpurl->result = *result_r;
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234 return 1;
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235 }
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236
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237 int imap_msgpart_url_verify(struct imap_msgpart_url *mpurl,
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238 const char **error_r)
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239 {
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240 struct mail *mail;
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241 int ret;
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242
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243 if (mpurl->result.input != NULL)
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244 return 1;
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diff changeset
245
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246 /* open mail if it is not yet open */
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247 ret = imap_msgpart_url_open_mail(mpurl, &mail, error_r);
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248 return ret;
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249 }
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250
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251 int imap_msgpart_url_get_bodypartstructure(struct imap_msgpart_url *mpurl,
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252 const char **bpstruct_r,
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253 const char **error_r)
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254 {
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255 struct mail *mail;
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256 int ret;
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257
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258 /* open mail if it is not yet open */
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259 ret = imap_msgpart_url_open_mail(mpurl, &mail, error_r);
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260 if (ret <= 0)
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261 return ret;
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262
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263 ret = imap_msgpart_bodypartstructure(mail, mpurl->part, bpstruct_r);
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264 if (ret < 0)
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265 *error_r = mailbox_get_last_error(mpurl->box, NULL);
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266 else if (ret == 0)
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267 *error_r = "Message part not found";
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268 return ret;
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269 }
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270
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271 void imap_msgpart_url_free(struct imap_msgpart_url **_mpurl)
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272 {
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273 struct imap_msgpart_url *mpurl = *_mpurl;
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274
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275 *_mpurl = NULL;
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276
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277 if (mpurl->result.input != NULL)
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278 i_stream_unref(&mpurl->result.input);
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279 if (mpurl->part != NULL)
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280 imap_msgpart_free(&mpurl->part);
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281 if (mpurl->mail != NULL)
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282 mail_free(&mpurl->mail);
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283 if (mpurl->trans != NULL)
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284 mailbox_transaction_rollback(&mpurl->trans);
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dd1a04580289 imap-msgpart-url: Attempt to reuse selected mailbox instead of reallocating a new one.
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parents: 14888
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285 if (mpurl->box != NULL && mpurl->box != mpurl->selected_box)
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286 mailbox_free(&mpurl->box);
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287 if (mpurl->section != NULL)
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288 i_free(mpurl->section);
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289 i_free(mpurl->mailbox);
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290 i_free(mpurl);
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291 }