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1 /* Copyright (C) 2002 Timo Sirainen */
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2
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3 #include "lib.h"
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4 #include "temp-string.h"
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5 #include "rfc822-tokenize.h"
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6 #include "message-parser.h"
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7 #include "message-content-parser.h"
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8 #include "imap-envelope.h"
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9 #include "imap-bodystructure.h"
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10
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11 #define EMPTY_BODYSTRUCTURE \
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12 "(\"text\" \"plain\" (\"charset\" \"us-ascii\") NIL NIL \"7bit\" 0 0)"
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13
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14 typedef struct {
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15 Pool pool;
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16 TempString *str;
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17 char *content_type, *content_subtype;
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18 char *content_type_params;
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19 char *content_transfer_encoding;
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20 char *content_id;
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21 char *content_description;
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22 char *content_disposition;
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23 char *content_disposition_params;
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24 char *content_md5;
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25 char *content_language;
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26
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27 MessagePartEnvelopeData *envelope;
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28 } MessagePartBodyData;
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29
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30 static void part_write_bodystructure(MessagePart *part, TempString *str,
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31 int extended);
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32
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33 static void parse_content_type(const Rfc822Token *tokens,
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34 int count, void *user_data)
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35 {
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36 MessagePartBodyData *data = user_data;
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37 const char *value;
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38 int i;
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39
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40 /* find the content type separator */
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41 for (i = 0; i < count; i++) {
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42 if (tokens[i].token == '/')
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43 break;
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44 }
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45
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46 value = rfc822_tokens_get_value_quoted(tokens, i, FALSE);
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47 data->content_type = p_strdup(data->pool, value);
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48
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49 value = rfc822_tokens_get_value_quoted(tokens+i+1, count-i-1, FALSE);
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50 data->content_subtype = p_strdup(data->pool, value);
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51 }
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52
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53 static void parse_save_params_list(const Rfc822Token *name,
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54 const Rfc822Token *value, int value_count,
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55 void *user_data)
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56 {
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57 MessagePartBodyData *data = user_data;
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58 const char *str;
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59
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60 if (data->str->len != 0)
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61 t_string_append_c(data->str, ' ');
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62
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63 t_string_append_c(data->str, '"');
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64 t_string_append_n(data->str, name->ptr, name->len);
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65 t_string_append(data->str, "\" ");
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66
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67 str = rfc822_tokens_get_value_quoted(value, value_count, FALSE);
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68 t_string_append(data->str, str);
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69 }
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70
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71 static void parse_content_transfer_encoding(const Rfc822Token *tokens,
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72 int count, void *user_data)
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73 {
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74 MessagePartBodyData *data = user_data;
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75 const char *value;
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76
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77 value = rfc822_tokens_get_value_quoted(tokens, count, FALSE);
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78 data->content_transfer_encoding = p_strdup(data->pool, value);
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79 }
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80
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81 static void parse_content_disposition(const Rfc822Token *tokens,
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82 int count, void *user_data)
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83 {
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84 MessagePartBodyData *data = user_data;
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85 const char *value;
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86
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87 value = rfc822_tokens_get_value_quoted(tokens, count, FALSE);
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88 data->content_disposition = p_strdup(data->pool, value);
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89 }
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90
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91 static void parse_content_language(const Rfc822Token *tokens,
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92 int count, void *user_data)
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93 {
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94 MessagePartBodyData *data = user_data;
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95 const char *value;
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96
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97 if (count <= 0)
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98 return;
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99
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100 value = rfc822_tokens_get_value_quoted(tokens, count, FALSE);
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101 data->content_language = p_strdup(data->pool, value);
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102
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103 /* FIXME: a,b,c -> "a" "b" "c" */
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104 }
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105
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106 static void parse_header(MessagePart *part,
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107 const char *name, unsigned int name_len,
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108 const char *value,
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109 unsigned int value_len, void *user_data)
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110 {
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111 Pool pool = user_data;
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112 MessagePartBodyData *part_data;
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113 int parent_rfc822;
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114
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115 parent_rfc822 = part->parent != NULL && part->parent->message_rfc822;
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116 if (!parent_rfc822 && (name_len <= 8 ||
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117 strncasecmp(name, "Content-", 8) != 0))
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118 return;
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119
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120 if (part->user_data == NULL) {
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121 /* initialize message part data */
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122 part->user_data = part_data =
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123 p_new(pool, MessagePartBodyData, 1);
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124 part_data->pool = pool;
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125 }
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126 part_data = part->user_data;
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127
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128 t_push();
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129
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130 /* fix the name to be \0-terminated */
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131 name = t_strndup(name, name_len);
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132
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133 if (strcasecmp(name, "Content-Type") == 0) {
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134 part_data->str = t_string_new(256);
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135 (void)message_content_parse_header(t_strndup(value, value_len),
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136 parse_content_type,
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137 parse_save_params_list,
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138 part_data);
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139 part_data->content_type_params =
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140 p_strdup(pool, part_data->str->str);
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141 } else if (strcasecmp(name, "Content-Transfer-Encoding") == 0) {
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142 (void)message_content_parse_header(t_strndup(value, value_len),
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143 parse_content_transfer_encoding,
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144 NULL, part_data);
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145 } else if (strcasecmp(name, "Content-ID") == 0) {
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146 part_data->content_id = p_strndup(pool, value, value_len);
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147 } else if (strcasecmp(name, "Content-Description") == 0) {
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148 part_data->content_description =
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149 p_strndup(pool, value, value_len);
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150 } else if (strcasecmp(name, "Content-Disposition") == 0) {
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151 part_data->str = t_string_new(256);
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152 (void)message_content_parse_header(t_strndup(value, value_len),
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153 parse_content_disposition,
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154 parse_save_params_list,
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155 part_data);
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156 part_data->content_disposition_params =
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157 p_strdup(pool, part_data->str->str);
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158 } else if (strcasecmp(name, "Content-Language") == 0) {
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159 (void)message_content_parse_header(t_strndup(value, value_len),
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160 parse_content_language, NULL,
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161 part_data);
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162 } else if (strcasecmp(name, "Content-MD5") == 0) {
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163 part_data->content_md5 = p_strndup(pool, value, value_len);
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164 } else if (parent_rfc822) {
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165 /* message/rfc822, we need the envelope */
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166 imap_envelope_parse_header(pool, &part_data->envelope,
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167 name, value, value_len);
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168 }
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169 t_pop();
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170 }
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171
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172 static void part_parse_headers(MessagePart *part, const char *msg,
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173 size_t size, Pool pool)
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174 {
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175 while (part != NULL) {
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176 /* note that we want to parse the header of all
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177 the message parts, multiparts too. */
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178 message_parse_header(part, msg + part->pos.physical_pos,
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179 part->header_size.physical_size,
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180 NULL, parse_header, pool);
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181
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182 if (part->children != NULL)
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183 part_parse_headers(part->children, msg, size, pool);
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184
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185 part = part->next;
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186 }
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187 }
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188
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189 static void part_write_body_multipart(MessagePart *part, TempString *str,
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190 int extended)
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191 {
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192 MessagePartBodyData *data = part->user_data;
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193
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194 if (part->children != NULL)
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195 part_write_bodystructure(part->children, str, extended);
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196 else {
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197 /* no parts in multipart message,
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198 that's not allowed. write a single
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199 0-length text/plain structure */
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200 t_string_append(str, EMPTY_BODYSTRUCTURE);
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201 }
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202
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203 t_string_append_c(str, ' ');
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204 t_string_append(str, data->content_subtype);
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205
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206 if (!extended)
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207 return;
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208
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209 /* BODYSTRUCTURE data */
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210 t_string_append_c(str, ' ');
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211 if (data->content_type_params == NULL)
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212 t_string_append(str, "NIL");
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213 else {
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214 t_string_append_c(str, '(');
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215 t_string_append(str, data->content_type_params);
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216 t_string_append_c(str, ')');
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217 }
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218
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219 t_string_append_c(str, ' ');
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220 if (data->content_disposition == NULL)
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221 t_string_append(str, "NIL");
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222 else {
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223 t_string_append_c(str, '(');
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224 t_string_append(str, data->content_disposition);
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225 if (data->content_disposition_params != NULL) {
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226 t_string_append(str, " (");
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227 t_string_append(str, data->content_disposition_params);
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228 t_string_append_c(str, ')');
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229 }
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230 t_string_append_c(str, ')');
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231 }
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232
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233 t_string_append_c(str, ' ');
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234 if (data->content_language == NULL)
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235 t_string_append(str, "NIL");
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236 else {
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237 t_string_append_c(str, '(');
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238 t_string_append(str, data->content_language);
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239 t_string_append_c(str, ')');
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240 }
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241 }
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242
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243 static void part_write_body(MessagePart *part, TempString *str, int extended)
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244 {
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245 MessagePartBodyData *data = part->user_data;
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246
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247 if (data == NULL) {
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248 /* there was no content headers, use an empty structure */
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249 data = t_new(MessagePartBodyData, 1);
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250 }
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251
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252 /* "content type" "subtype" */
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253 t_string_append(str, NVL(data->content_type, "\"text\""));
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254 t_string_append_c(str, ' ');
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255 t_string_append(str, NVL(data->content_subtype, "\"plain\""));
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256
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257 /* ("content type param key" "value" ...) */
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258 t_string_append_c(str, ' ');
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259 if (data->content_type_params == NULL)
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260 t_string_append(str, "NIL");
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261 else {
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262 t_string_append_c(str, '(');
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263 t_string_append(str, data->content_type_params);
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264 t_string_append_c(str, ')');
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265 }
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266
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267 t_string_printfa(str, " %s %s %s %lu",
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268 NVL(data->content_id, "NIL"),
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269 NVL(data->content_description, "NIL"),
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270 NVL(data->content_transfer_encoding, "\"8bit\""),
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271 (unsigned long) part->body_size.virtual_size);
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272
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273 if (part->text) {
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274 /* text/.. contains line count */
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275 t_string_printfa(str, " %u", part->body_size.lines);
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276 } else if (part->message_rfc822) {
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277 /* message/rfc822 contains envelope + body + line count */
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278 MessagePartBodyData *child_data;
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279
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280 i_assert(part->children != NULL);
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281 i_assert(part->children->next == NULL);
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282
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283 child_data = part->children->user_data;
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284
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285 t_string_append_c(str, ' ');
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286 if (child_data != NULL && child_data->envelope != NULL) {
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287 imap_envelope_write_part_data(child_data->envelope,
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288 str);
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289 } else {
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290 /* buggy message */
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291 t_string_append(str, "NIL");
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292 }
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293 t_string_append_c(str, ' ');
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294 part_write_bodystructure(part->children, str, extended);
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295 t_string_printfa(str, " %u", part->body_size.lines);
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296 }
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297
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298 if (!extended)
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299 return;
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300
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301 /* BODYSTRUCTURE data */
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302
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303 /* "md5" ("content disposition" ("disposition" "params"))
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304 ("body" "language" "params") */
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305 t_string_append_c(str, ' ');
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306 t_string_append(str, NVL(data->content_md5, "NIL"));
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307
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308 t_string_append_c(str, ' ');
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309 if (data->content_disposition == NULL)
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310 t_string_append(str, "NIL");
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311 else {
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312 t_string_append_c(str, '(');
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313 t_string_append(str, data->content_disposition);
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314 t_string_append_c(str, ')');
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315
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316 if (data->content_disposition_params != NULL) {
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317 t_string_append(str, " (");
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318 t_string_append(str, data->content_disposition_params);
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319 t_string_append_c(str, ')');
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320 }
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321 }
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322
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323 t_string_append_c(str, ' ');
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324 if (data->content_language == NULL)
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325 t_string_append(str, "NIL");
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326 else {
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327 t_string_append_c(str, '(');
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328 t_string_append(str, data->content_language);
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329 t_string_append_c(str, ')');
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330 }
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331 }
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332
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333 static void part_write_bodystructure(MessagePart *part, TempString *str,
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334 int extended)
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335 {
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336 while (part != NULL) {
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337 t_string_append_c(str, '(');
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338 if (part->multipart)
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339 part_write_body_multipart(part, str, extended);
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340 else
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341 part_write_body(part, str, extended);
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342
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343 part = part->next;
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344 t_string_append_c(str, ')');
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345 }
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346 }
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347
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348 static const char *part_get_bodystructure(MessagePart *part, int extended)
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349 {
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350 TempString *str;
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351
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352 str = t_string_new(2048);
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353 part_write_bodystructure(part, str, extended);
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354 return str->str;
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355 }
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356
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357 const char *imap_part_get_bodystructure(Pool pool, MessagePart **part,
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358 const char *msg, size_t size,
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359 int extended)
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360 {
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361 if (*part == NULL)
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362 *part = message_parse(pool, msg, size, parse_header, pool);
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363 else
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364 part_parse_headers(*part, msg, size, pool);
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365
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366 return part_get_bodystructure(*part, extended);
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367 }
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