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11
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1 /**
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2 * Copyright (c) 2005 Zed A. Shaw,
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3 * Modified for D/DReactor by Rick Richardson, 2008
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4 * You can redistribute it and/or modify it under the same terms as Ruby.
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5 */
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6
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7 alias void delegate (void *data, const char *at, size_t length) element_cb;
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8 alias void delegate (void *data, const char *field, size_t flen, const char *value, size_t vlen) field_cb;
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9
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10 class Http11Parser
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11 {
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12 int cs;
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13 size_t body_start;
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14 int content_len;
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15 size_t nread;
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16 size_t mark;
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17 size_t field_start;
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18 size_t field_len;
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19 size_t query_start;
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20
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21 void *data;
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22
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23 field_cb http_field;
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24 element_cb request_method;
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25 element_cb request_uri;
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26 element_cb fragment;
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27 element_cb request_path;
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28 element_cb query_string;
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29 element_cb http_version;
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30 element_cb header_done;
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31
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32 /*
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33 * capitalizes all lower-case ASCII characters,
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34 * converts dashes to underscores.
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35 */
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36 private void snake_upcase_char(char *c)
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37 {
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38 if (*c >= 'a' && *c <= 'z')
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39 *c &= ~0x20;
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40 else if (*c == '-')
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41 *c = '_';
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42 }
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43
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44 //#define LEN(AT, FPC) (FPC - buffer - parser->AT)
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45 private int LEN(char* at, char* fpc)
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46 {
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47 return (fpc - buffer.ptr - at);
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48 }
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49
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50 //#define MARK(M,FPC) (parser->M = (FPC) - buffer)
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51 private void MARK(size_t* item, char* fpc)
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52 {
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53 *item = fpc - buffer.ptr;
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54 }
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55
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56 //#define PTR_TO(F) (buffer + parser->F)
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57 private char* PTR_TO(size_t F)
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58 {
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59 return (buffer.ptr + F);
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60 }
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61 /** Machine **/
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62
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63 %%{
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64
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65 machine http_parser;
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66
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67 action mark {MARK(mark, fpc); }
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68
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69
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70 action start_field { MARK(field_start, fpc); }
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71 action snake_upcase_field { snake_upcase_char((char *)fpc); }
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72 action write_field {
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73 field_len = LEN(field_start, fpc);
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74 }
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75
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76 action start_value { MARK(mark, fpc); }
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77 action write_value {
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78 if(http_field)
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79 http_field(data,
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80 PTR_TO(field_start),
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81 field_len,
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82 PTR_TO(mark),
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83 LEN(mark, fpc));
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84 }
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85 action request_method {
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86 if(request_method)
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87 request_method(data, PTR_TO(mark), LEN(mark, fpc));
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88 }
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89
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90 action request_uri {
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91 if(request_uri)
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92 request_uri(data, PTR_TO(mark), LEN(mark, fpc));
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93 }
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94
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95 action fragment {
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96 if(fragment)
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97 fragment(data, PTR_TO(mark), LEN(mark, fpc));
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98 }
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99
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100 action start_query {MARK(query_start, fpc); }
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101
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102 action query_string {
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103 if(query_string)
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104 query_string(data, PTR_TO(query_start), LEN(query_start, fpc));
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105 }
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106
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107 action http_version {
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108 if(http_version)
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109 http_version(data, PTR_TO(mark), LEN(mark, fpc));
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110 }
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111
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112 action request_path {
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113 if(request_path)
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114 request_path(data, PTR_TO(mark), LEN(mark,fpc));
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115 }
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116
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117 action done {
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118 body_start = fpc - buffer + 1;
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119 if(header_done)
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120 header_done(data, fpc + 1, pe - fpc - 1);
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121 fbreak;
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122 }
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123
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124 include http_parser_common "http11_parser_common.rl";
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125
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126 }%%
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127
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128 /** Data **/
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129 %% write data;
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130
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131 this ()
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132 {
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133 cs = 0;
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134 %% write init;
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135
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136 body_start = 0;
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137 content_len = 0;
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138 mark = 0;
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139 nread = 0;
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140 field_len = 0;
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141 field_start = 0;
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142 }
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143
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144
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145 /** exec **/
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146 size_t execute(const char[] buffer, size_t off) {
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147 const char *p, *pe;
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148 int len = buffer.length;
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149
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150 assert(off <= len && "offset past end of buffer");
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151
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152 p = buffer.ptr+off;
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153 pe = buffer.ptr+len;
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154
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155 /* assert(*pe == '\0' && "pointer does not end on NUL"); */
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156 assert(pe - p == len - off && "pointers aren't same distance");
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157
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158 %% write exec;
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159
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160 //parser->cs = cs;
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161 nread += p - (buffer.ptr + off);
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162
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163 assert(p <= pe && "buffer overflow after parsing execute");
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164 assert(nread <= len && "nread longer than length");
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165 assert(body_start <= len && "body starts after buffer end");
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166 assert(mark < len && "mark is after buffer end");
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167 assert(field_len <= len && "field has length longer than whole buffer");
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168 assert(field_start < len && "field starts after buffer end");
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169
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170 return(nread);
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171 }
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172
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173 int finish()
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174 {
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175 if (has_error() ) {
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176 return -1;
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177 } else if (is_finished() ) {
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178 return 1;
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179 } else {
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180 return 0;
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181 }
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182 }
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183
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184 bool has_error() {
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185 return cs == http_parser_error;
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186 }
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187
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188 bool is_finished() {
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189 return cs >= http_parser_first_final;
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190 }
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191
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192 }
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