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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_http.h>
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10
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11
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12 ngx_int_t ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
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13 {
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14 u_char ch, *p, *m;
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15 enum {
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16 sw_start = 0,
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17 sw_method,
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18 sw_space_after_method,
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19 sw_spaces_before_uri,
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20 sw_schema,
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21 sw_schema_slash,
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22 sw_schema_slash_slash,
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23 sw_host,
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24 sw_port,
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25 sw_after_slash_in_uri,
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26 sw_check_uri,
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27 sw_uri,
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28 sw_http_09,
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29 sw_http_H,
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30 sw_http_HT,
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31 sw_http_HTT,
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32 sw_http_HTTP,
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33 sw_first_major_digit,
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34 sw_major_digit,
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35 sw_first_minor_digit,
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36 sw_minor_digit,
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37 sw_almost_done,
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38 sw_done
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39 } state;
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40
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41 state = r->state;
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42 p = b->pos;
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43
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44 while (p < b->last && state < sw_done) {
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45 ch = *p++;
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46
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47 /* gcc 2.95.2 and msvc 6.0 compile this switch as an jump table */
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48
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49 switch (state) {
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50
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51 /* HTTP methods: GET, HEAD, POST */
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52 case sw_start:
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53 r->request_start = p - 1;
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54
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55 if (ch == CR || ch == LF) {
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56 break;
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57 }
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58
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59 if (ch < 'A' || ch > 'Z') {
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60 return NGX_HTTP_PARSE_INVALID_METHOD;
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61 }
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62
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63 state = sw_method;
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64 break;
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65
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66 case sw_method:
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67 if (ch == ' ') {
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68 r->method_end = p - 1;
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69 m = r->request_start;
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70
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71 if (r->method_end - m == 3) {
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72
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73 if (m[0] == 'G' && m[1] == 'E' && m[2] == 'T') {
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74 r->method = NGX_HTTP_GET;
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75 }
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76
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77 } else if (r->method_end - m == 4) {
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78
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79 if (m[0] == 'P' && m[1] == 'O'
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80 && m[2] == 'T' && m[3] == 'T')
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81 {
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82 r->method = NGX_HTTP_POST;
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83
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84 } else if (m[0] == 'H' && m[1] == 'E'
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85 && m[2] == 'A' && m[3] == 'D')
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86 {
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87 r->method = NGX_HTTP_HEAD;
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88 }
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89 }
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90
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91 state = sw_spaces_before_uri;
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92 break;
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93 }
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94
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95 if (ch < 'A' || ch > 'Z') {
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96 return NGX_HTTP_PARSE_INVALID_METHOD;
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97 }
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98
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99 break;
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100
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101 /* single space after method */
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102 case sw_space_after_method:
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103 switch (ch) {
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104 case ' ':
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105 state = sw_spaces_before_uri;
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106 break;
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107 default:
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108 return NGX_HTTP_PARSE_INVALID_METHOD;
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109 }
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110 break;
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111
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112 /* space* before URI */
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113 case sw_spaces_before_uri:
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114 switch (ch) {
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115 case '/':
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116 r->uri_start = p - 1;
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117 state = sw_after_slash_in_uri;
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118 break;
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119 case ' ':
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120 break;
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121 default:
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122 if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) {
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123 r->schema_start = p - 1;
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124 state = sw_schema;
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125 break;
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126 }
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127 return NGX_HTTP_PARSE_INVALID_REQUEST;
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128 }
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129 break;
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130
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131 case sw_schema:
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132 switch (ch) {
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133 case ':':
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134 r->schema_end = p - 1;
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135 state = sw_schema_slash;
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136 break;
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137 default:
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138 if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')) {
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139 break;
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140 }
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141 return NGX_HTTP_PARSE_INVALID_REQUEST;
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142 }
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143 break;
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144
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145 case sw_schema_slash:
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146 switch (ch) {
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147 case '/':
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148 state = sw_schema_slash_slash;
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149 break;
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150 default:
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151 return NGX_HTTP_PARSE_INVALID_REQUEST;
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152 }
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153 break;
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154
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155 case sw_schema_slash_slash:
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156 switch (ch) {
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157 case '/':
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158 r->host_start = p - 1;
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159 state = sw_host;
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160 break;
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161 default:
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162 return NGX_HTTP_PARSE_INVALID_REQUEST;
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163 }
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164 break;
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165
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166 case sw_host:
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167 switch (ch) {
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168 case ':':
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169 r->host_end = p - 1;
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170 state = sw_port;
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171 break;
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172 case '/':
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173 r->host_end = p - 1;
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174 r->uri_start = p - 1;
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175 state = sw_after_slash_in_uri;
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176 break;
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177 default:
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178 if ((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z')
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179 || (ch >= '0' && ch <= '9') || ch == '.' || ch == '-')
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180 {
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181 break;
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182 }
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183 return NGX_HTTP_PARSE_INVALID_REQUEST;
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184 }
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185 break;
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186
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187 case sw_port:
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188 switch (ch) {
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189 case '/':
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190 r->port_end = p - 1;
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191 r->uri_start = p - 1;
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192 state = sw_after_slash_in_uri;
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193 break;
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194 default:
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195 if (ch < '0' && ch > '9') {
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196 return NGX_HTTP_PARSE_INVALID_REQUEST;
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197 }
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198 break;
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199 }
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200 break;
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201
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10
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202 /* check "/.", "//", "%", and "\" (Win32) in URI */
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0
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203 case sw_after_slash_in_uri:
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204 switch (ch) {
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205 case CR:
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206 r->uri_end = p - 1;
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207 r->http_minor = 9;
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208 state = sw_almost_done;
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209 break;
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210 case LF:
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211 r->uri_end = p - 1;
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212 r->http_minor = 9;
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213 state = sw_done;
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214 break;
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215 case ' ':
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216 r->uri_end = p - 1;
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217 state = sw_http_09;
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218 break;
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219 case '.':
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2
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220 r->complex_uri = 1;
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221 state = sw_uri;
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222 break;
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0
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223 case '%':
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2
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224 r->quoted_uri = 1;
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0
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225 state = sw_uri;
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226 break;
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10
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227 #if (NGX_WIN32)
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228 case '\\':
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229 r->complex_uri = 1;
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230 break;
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231 #endif
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0
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232 case '/':
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233 r->complex_uri = 1;
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234 break;
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235 case '?':
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236 r->args_start = p;
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237 state = sw_uri;
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238 break;
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239 default:
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240 state = sw_check_uri;
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241 break;
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242 }
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243 break;
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244
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10
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245 /* check "/", "%" and "\" (Win32) in URI */
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0
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246 case sw_check_uri:
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247 switch (ch) {
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248 case CR:
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249 r->uri_end = p - 1;
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250 r->http_minor = 9;
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251 state = sw_almost_done;
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252 break;
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253 case LF:
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254 r->uri_end = p - 1;
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255 r->http_minor = 9;
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256 state = sw_done;
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257 break;
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258 case ' ':
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259 r->uri_end = p - 1;
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260 state = sw_http_09;
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261 break;
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262 case '.':
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263 r->uri_ext = p;
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264 break;
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10
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265 #if (NGX_WIN32)
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266 case '\\':
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267 r->complex_uri = 1;
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268 state = sw_after_slash_in_uri;
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269 break;
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270 #endif
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0
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271 case '/':
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272 r->uri_ext = NULL;
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273 state = sw_after_slash_in_uri;
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274 break;
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275 case '%':
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2
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276 r->quoted_uri = 1;
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0
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277 state = sw_uri;
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278 break;
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279 case '?':
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280 r->args_start = p;
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281 state = sw_uri;
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282 break;
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283 }
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284 break;
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285
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286 /* URI */
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287 case sw_uri:
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288 switch (ch) {
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289 case CR:
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290 r->uri_end = p - 1;
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291 r->http_minor = 9;
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292 state = sw_almost_done;
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293 break;
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294 case LF:
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295 r->uri_end = p - 1;
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296 r->http_minor = 9;
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297 state = sw_done;
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298 break;
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299 case ' ':
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300 r->uri_end = p - 1;
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301 state = sw_http_09;
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302 break;
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303 }
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304 break;
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305
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306 /* space+ after URI */
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307 case sw_http_09:
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308 switch (ch) {
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309 case ' ':
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310 break;
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311 case CR:
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312 r->http_minor = 9;
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313 state = sw_almost_done;
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314 break;
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315 case LF:
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316 r->http_minor = 9;
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317 state = sw_done;
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318 break;
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319 case 'H':
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320 state = sw_http_H;
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321 break;
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322 default:
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323 return NGX_HTTP_PARSE_INVALID_REQUEST;
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324 }
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325 break;
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326
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327 case sw_http_H:
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328 switch (ch) {
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329 case 'T':
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330 state = sw_http_HT;
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331 break;
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332 default:
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333 return NGX_HTTP_PARSE_INVALID_REQUEST;
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334 }
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335 break;
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336
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337 case sw_http_HT:
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338 switch (ch) {
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339 case 'T':
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340 state = sw_http_HTT;
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341 break;
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342 default:
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343 return NGX_HTTP_PARSE_INVALID_REQUEST;
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344 }
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345 break;
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346
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347 case sw_http_HTT:
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348 switch (ch) {
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349 case 'P':
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350 state = sw_http_HTTP;
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351 break;
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352 default:
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353 return NGX_HTTP_PARSE_INVALID_REQUEST;
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354 }
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355 break;
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356
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357 case sw_http_HTTP:
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358 switch (ch) {
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359 case '/':
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360 state = sw_first_major_digit;
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361 break;
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362 default:
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363 return NGX_HTTP_PARSE_INVALID_REQUEST;
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364 }
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365 break;
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366
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367 /* first digit of major HTTP version */
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368 case sw_first_major_digit:
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369 if (ch < '1' || ch > '9') {
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370 return NGX_HTTP_PARSE_INVALID_REQUEST;
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371 }
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372
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373 r->http_major = ch - '0';
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374 state = sw_major_digit;
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375 break;
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376
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377 /* major HTTP version or dot */
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378 case sw_major_digit:
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379 if (ch == '.') {
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380 state = sw_first_minor_digit;
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381 break;
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382 }
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383
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384 if (ch < '0' || ch > '9') {
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385 return NGX_HTTP_PARSE_INVALID_REQUEST;
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386 }
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387
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388 r->http_major = r->http_major * 10 + ch - '0';
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389 break;
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390
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391 /* first digit of minor HTTP version */
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392 case sw_first_minor_digit:
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393 if (ch < '0' || ch > '9') {
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394 return NGX_HTTP_PARSE_INVALID_REQUEST;
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395 }
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396
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397 r->http_minor = ch - '0';
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398 state = sw_minor_digit;
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399 break;
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400
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401 /* minor HTTP version or end of request line */
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402 case sw_minor_digit:
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403 if (ch == CR) {
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404 state = sw_almost_done;
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405 break;
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406 }
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407
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408 if (ch == LF) {
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409 state = sw_done;
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410 break;
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411 }
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412
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413 if (ch < '0' || ch > '9') {
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414 return NGX_HTTP_PARSE_INVALID_REQUEST;
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415 }
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416
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417 r->http_minor = r->http_minor * 10 + ch - '0';
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418 break;
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419
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420 /* end of request line */
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421 case sw_almost_done:
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422 r->request_end = p - 2;
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423 switch (ch) {
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424 case LF:
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425 state = sw_done;
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426 break;
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427 default:
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428 return NGX_HTTP_PARSE_INVALID_REQUEST;
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429 }
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430 break;
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431
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432 /* suppress warning */
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433 case sw_done:
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434 break;
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435 }
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436 }
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437
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438 b->pos = p;
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439
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440 if (state == sw_done) {
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441 if (r->request_end == NULL) {
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442 r->request_end = p - 1;
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443 }
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444
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445 r->http_version = r->http_major * 1000 + r->http_minor;
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446 r->state = sw_start;
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447
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448 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
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449 return NGX_HTTP_PARSE_INVALID_09_METHOD;
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450 }
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451
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452 return NGX_OK;
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453
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454 } else {
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455 r->state = state;
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456 return NGX_AGAIN;
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457 }
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458 }
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459
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460
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461 ngx_int_t ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
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462 {
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463 u_char c, ch, *p;
|
|
|
464 enum {
|
|
|
465 sw_start = 0,
|
|
|
466 sw_name,
|
|
|
467 sw_space_before_value,
|
|
|
468 sw_value,
|
|
|
469 sw_space_after_value,
|
|
|
470 sw_almost_done,
|
|
|
471 sw_header_almost_done,
|
|
|
472 sw_ignore_line,
|
|
|
473 sw_done,
|
|
|
474 sw_header_done
|
|
|
475 } state;
|
|
|
476
|
|
|
477 state = r->state;
|
|
|
478 p = b->pos;
|
|
|
479
|
|
|
480 while (p < b->last && state < sw_done) {
|
|
|
481 ch = *p++;
|
|
|
482
|
|
|
483 switch (state) {
|
|
|
484
|
|
|
485 /* first char */
|
|
|
486 case sw_start:
|
|
|
487 switch (ch) {
|
|
|
488 case CR:
|
|
|
489 r->header_end = p - 1;
|
|
|
490 state = sw_header_almost_done;
|
|
|
491 break;
|
|
|
492 case LF:
|
|
|
493 r->header_end = p - 1;
|
|
|
494 state = sw_header_done;
|
|
|
495 break;
|
|
|
496 default:
|
|
|
497 state = sw_name;
|
|
|
498 r->header_name_start = p - 1;
|
|
|
499
|
|
|
500 c = (u_char) (ch | 0x20);
|
|
|
501 if (c >= 'a' && c <= 'z') {
|
|
|
502 break;
|
|
|
503 }
|
|
|
504
|
|
|
505 if (ch == '-' || ch == '_' || ch == '~' || ch == '.') {
|
|
|
506 break;
|
|
|
507 }
|
|
|
508
|
|
|
509 if (ch >= '0' && ch <= '9') {
|
|
|
510 break;
|
|
|
511 }
|
|
|
512
|
|
|
513 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
514
|
|
|
515 }
|
|
|
516 break;
|
|
|
517
|
|
|
518 /* header name */
|
|
|
519 case sw_name:
|
|
|
520 c = (u_char) (ch | 0x20);
|
|
|
521 if (c >= 'a' && c <= 'z') {
|
|
|
522 break;
|
|
|
523 }
|
|
|
524
|
|
|
525 if (ch == ':') {
|
|
|
526 r->header_name_end = p - 1;
|
|
|
527 state = sw_space_before_value;
|
|
|
528 break;
|
|
|
529 }
|
|
|
530
|
|
|
531 if (ch == '-' || ch == '_' || ch == '~' || ch == '.') {
|
|
|
532 break;
|
|
|
533 }
|
|
|
534
|
|
|
535 if (ch >= '0' && ch <= '9') {
|
|
|
536 break;
|
|
|
537 }
|
|
|
538
|
|
2
|
539 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
540 if (ch == '/'
|
|
|
541 && r->proxy
|
|
|
542 && p - r->header_start == 5
|
|
|
543 && ngx_strncmp(r->header_start, "HTTP", 4) == 0)
|
|
|
544 {
|
|
|
545 state = sw_ignore_line;
|
|
|
546 break;
|
|
|
547 }
|
|
|
548
|
|
|
549 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
550
|
|
|
551 /* space* before header value */
|
|
|
552 case sw_space_before_value:
|
|
|
553 switch (ch) {
|
|
|
554 case ' ':
|
|
|
555 break;
|
|
|
556 case CR:
|
|
|
557 r->header_start = r->header_end = p - 1;
|
|
|
558 state = sw_almost_done;
|
|
|
559 break;
|
|
|
560 case LF:
|
|
|
561 r->header_start = r->header_end = p - 1;
|
|
|
562 state = sw_done;
|
|
|
563 break;
|
|
|
564 default:
|
|
|
565 r->header_start = p - 1;
|
|
|
566 state = sw_value;
|
|
|
567 break;
|
|
|
568 }
|
|
|
569 break;
|
|
|
570
|
|
|
571 /* header value */
|
|
|
572 case sw_value:
|
|
|
573 switch (ch) {
|
|
|
574 case ' ':
|
|
|
575 r->header_end = p - 1;
|
|
|
576 state = sw_space_after_value;
|
|
|
577 break;
|
|
|
578 case CR:
|
|
|
579 r->header_end = p - 1;
|
|
|
580 state = sw_almost_done;
|
|
|
581 break;
|
|
|
582 case LF:
|
|
|
583 r->header_end = p - 1;
|
|
|
584 state = sw_done;
|
|
|
585 break;
|
|
|
586 }
|
|
|
587 break;
|
|
|
588
|
|
|
589 /* space* before end of header line */
|
|
|
590 case sw_space_after_value:
|
|
|
591 switch (ch) {
|
|
|
592 case ' ':
|
|
|
593 break;
|
|
|
594 case CR:
|
|
|
595 state = sw_almost_done;
|
|
|
596 break;
|
|
|
597 case LF:
|
|
|
598 state = sw_done;
|
|
|
599 break;
|
|
|
600 default:
|
|
|
601 state = sw_value;
|
|
|
602 break;
|
|
|
603 }
|
|
|
604 break;
|
|
|
605
|
|
|
606 /* ignore header line */
|
|
|
607 case sw_ignore_line:
|
|
|
608 switch (ch) {
|
|
|
609 case LF:
|
|
|
610 state = sw_start;
|
|
|
611 break;
|
|
|
612 default:
|
|
|
613 break;
|
|
|
614 }
|
|
|
615 break;
|
|
|
616
|
|
|
617 /* end of header line */
|
|
|
618 case sw_almost_done:
|
|
|
619 switch (ch) {
|
|
|
620 case LF:
|
|
|
621 state = sw_done;
|
|
|
622 break;
|
|
|
623 default:
|
|
|
624 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
625 }
|
|
|
626 break;
|
|
|
627
|
|
|
628 /* end of header */
|
|
|
629 case sw_header_almost_done:
|
|
|
630 switch (ch) {
|
|
|
631 case LF:
|
|
|
632 state = sw_header_done;
|
|
|
633 break;
|
|
|
634 default:
|
|
|
635 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
636 }
|
|
|
637 break;
|
|
|
638
|
|
|
639 /* suppress warning */
|
|
|
640 case sw_done:
|
|
|
641 case sw_header_done:
|
|
|
642 break;
|
|
|
643 }
|
|
|
644 }
|
|
|
645
|
|
|
646 b->pos = p;
|
|
|
647
|
|
|
648 if (state == sw_done) {
|
|
|
649 r->state = sw_start;
|
|
|
650 return NGX_OK;
|
|
|
651
|
|
|
652 } else if (state == sw_header_done) {
|
|
|
653 r->state = sw_start;
|
|
|
654 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
|
655
|
|
|
656 } else {
|
|
|
657 r->state = state;
|
|
|
658 return NGX_AGAIN;
|
|
|
659 }
|
|
|
660 }
|
|
|
661
|
|
|
662
|
|
|
663 ngx_int_t ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
|
664 {
|
|
|
665 u_char c, ch, decoded, *p, *u;
|
|
|
666 enum {
|
|
|
667 sw_usual = 0,
|
|
22
|
668 sw_colon,
|
|
|
669 sw_colon_slash,
|
|
0
|
670 sw_slash,
|
|
|
671 sw_dot,
|
|
|
672 sw_dot_dot,
|
|
10
|
673 #if (NGX_WIN32)
|
|
0
|
674 sw_dot_dot_dot,
|
|
|
675 #endif
|
|
|
676 sw_quoted,
|
|
|
677 sw_quoted_second
|
|
|
678 } state, quoted_state;
|
|
|
679
|
|
|
680 decoded = '\0';
|
|
|
681 quoted_state = sw_usual;
|
|
|
682
|
|
|
683 state = sw_usual;
|
|
|
684 p = r->uri_start;
|
|
|
685 u = r->uri.data;
|
|
|
686 r->uri_ext = NULL;
|
|
10
|
687 r->args_start = NULL;
|
|
0
|
688
|
|
|
689 ch = *p++;
|
|
|
690
|
|
20
|
691 while (p <= r->uri_end && r->args_start == NULL) {
|
|
10
|
692
|
|
|
693 /*
|
|
|
694 * we use "ch = *p++" inside the cycle but this operation is safe
|
|
|
695 * because after the URI there is always at least one charcter:
|
|
|
696 * the line feed
|
|
|
697 */
|
|
0
|
698
|
|
|
699 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
700 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
701
|
|
|
702 switch (state) {
|
|
|
703 case sw_usual:
|
|
|
704 switch(ch) {
|
|
10
|
705 #if (NGX_WIN32)
|
|
|
706 case '\\':
|
|
|
707 r->uri_ext = NULL;
|
|
|
708
|
|
|
709 if (p == r->uri_start + r->uri.len) {
|
|
|
710
|
|
|
711 /*
|
|
|
712 * we omit the last "\" to cause redirect because
|
|
|
713 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
714 */
|
|
|
715
|
|
|
716 break;
|
|
|
717 }
|
|
|
718
|
|
|
719 state = sw_slash;
|
|
|
720 *u++ = '/';
|
|
|
721 break;
|
|
|
722 #endif
|
|
0
|
723 case '/':
|
|
|
724 r->uri_ext = NULL;
|
|
|
725 state = sw_slash;
|
|
|
726 *u++ = ch;
|
|
|
727 break;
|
|
|
728 case '%':
|
|
|
729 quoted_state = state;
|
|
|
730 state = sw_quoted;
|
|
|
731 break;
|
|
10
|
732 case '?':
|
|
|
733 r->args_start = p;
|
|
|
734 break;
|
|
22
|
735 case ':':
|
|
|
736 state = sw_colon;
|
|
|
737 *u++ = ch;
|
|
|
738 break;
|
|
0
|
739 case '.':
|
|
|
740 r->uri_ext = u + 1;
|
|
22
|
741 *u++ = ch;
|
|
|
742 break;
|
|
0
|
743 default:
|
|
|
744 *u++ = ch;
|
|
|
745 break;
|
|
|
746 }
|
|
|
747 ch = *p++;
|
|
|
748 break;
|
|
|
749
|
|
22
|
750 case sw_colon:
|
|
|
751 switch(ch) {
|
|
|
752 #if (NGX_WIN32)
|
|
|
753 case '\\':
|
|
|
754 state = sw_colon_slash;
|
|
|
755 *u++ = '/';
|
|
|
756 break;
|
|
|
757 #endif
|
|
|
758 case '/':
|
|
|
759 state = sw_colon_slash;
|
|
|
760 *u++ = ch;
|
|
|
761 break;
|
|
|
762 case ':':
|
|
|
763 *u++ = ch;
|
|
|
764 break;
|
|
|
765 case '%':
|
|
|
766 quoted_state = state;
|
|
|
767 state = sw_quoted;
|
|
|
768 break;
|
|
|
769 default:
|
|
|
770 state = sw_usual;
|
|
|
771 *u++ = ch;
|
|
|
772 break;
|
|
|
773 }
|
|
|
774 ch = *p++;
|
|
|
775 break;
|
|
|
776
|
|
|
777 case sw_colon_slash:
|
|
|
778 switch(ch) {
|
|
|
779 #if (NGX_WIN32)
|
|
|
780 case '\\':
|
|
|
781 state = sw_slash;
|
|
|
782 *u++ = '/';
|
|
|
783 break;
|
|
|
784 #endif
|
|
|
785 case '/':
|
|
|
786 state = sw_slash;
|
|
|
787 *u++ = ch;
|
|
|
788 break;
|
|
|
789 case '.':
|
|
|
790 state = sw_dot;
|
|
|
791 *u++ = ch;
|
|
|
792 break;
|
|
|
793 case '%':
|
|
|
794 quoted_state = state;
|
|
|
795 state = sw_quoted;
|
|
|
796 break;
|
|
|
797 default:
|
|
|
798 state = sw_usual;
|
|
|
799 *u++ = ch;
|
|
|
800 break;
|
|
|
801 }
|
|
|
802 ch = *p++;
|
|
|
803 break;
|
|
|
804
|
|
0
|
805 case sw_slash:
|
|
|
806 switch(ch) {
|
|
10
|
807 #if (NGX_WIN32)
|
|
|
808 case '\\':
|
|
|
809 break;
|
|
|
810 #endif
|
|
0
|
811 case '/':
|
|
|
812 break;
|
|
|
813 case '.':
|
|
|
814 state = sw_dot;
|
|
|
815 *u++ = ch;
|
|
|
816 break;
|
|
|
817 case '%':
|
|
|
818 quoted_state = state;
|
|
|
819 state = sw_quoted;
|
|
|
820 break;
|
|
|
821 default:
|
|
|
822 state = sw_usual;
|
|
|
823 *u++ = ch;
|
|
|
824 break;
|
|
|
825 }
|
|
|
826 ch = *p++;
|
|
|
827 break;
|
|
|
828
|
|
|
829 case sw_dot:
|
|
|
830 switch(ch) {
|
|
10
|
831 #if (NGX_WIN32)
|
|
|
832 case '\\':
|
|
|
833 /* fall through */
|
|
|
834 #endif
|
|
0
|
835 case '/':
|
|
|
836 state = sw_slash;
|
|
|
837 u--;
|
|
|
838 break;
|
|
|
839 case '.':
|
|
|
840 state = sw_dot_dot;
|
|
|
841 *u++ = ch;
|
|
|
842 break;
|
|
|
843 case '%':
|
|
|
844 quoted_state = state;
|
|
|
845 state = sw_quoted;
|
|
|
846 break;
|
|
|
847 default:
|
|
|
848 state = sw_usual;
|
|
|
849 *u++ = ch;
|
|
|
850 break;
|
|
|
851 }
|
|
|
852 ch = *p++;
|
|
|
853 break;
|
|
|
854
|
|
|
855 case sw_dot_dot:
|
|
|
856 switch(ch) {
|
|
10
|
857 #if (NGX_WIN32)
|
|
|
858 case '\\':
|
|
|
859 /* fall through */
|
|
|
860 #endif
|
|
0
|
861 case '/':
|
|
|
862 state = sw_slash;
|
|
|
863 u -= 4;
|
|
|
864 if (u < r->uri.data) {
|
|
|
865 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
866 }
|
|
|
867 while (*(u - 1) != '/') {
|
|
|
868 u--;
|
|
|
869 }
|
|
|
870 break;
|
|
|
871 case '%':
|
|
|
872 quoted_state = state;
|
|
|
873 state = sw_quoted;
|
|
|
874 break;
|
|
10
|
875 #if (NGX_WIN32)
|
|
0
|
876 case '.':
|
|
|
877 state = sw_dot_dot_dot;
|
|
|
878 *u++ = ch;
|
|
|
879 break;
|
|
|
880 #endif
|
|
|
881 default:
|
|
|
882 state = sw_usual;
|
|
|
883 *u++ = ch;
|
|
|
884 break;
|
|
|
885 }
|
|
|
886 ch = *p++;
|
|
|
887 break;
|
|
|
888
|
|
10
|
889 #if (NGX_WIN32)
|
|
0
|
890 case sw_dot_dot_dot:
|
|
|
891 switch(ch) {
|
|
10
|
892 case '\\':
|
|
0
|
893 case '/':
|
|
|
894 state = sw_slash;
|
|
|
895 u -= 5;
|
|
|
896 if (u < r->uri.data) {
|
|
|
897 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
898 }
|
|
|
899 while (*u != '/') {
|
|
|
900 u--;
|
|
|
901 }
|
|
|
902 if (u < r->uri.data) {
|
|
|
903 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
904 }
|
|
|
905 while (*(u - 1) != '/') {
|
|
|
906 u--;
|
|
|
907 }
|
|
|
908 break;
|
|
|
909 case '%':
|
|
|
910 quoted_state = state;
|
|
|
911 state = sw_quoted;
|
|
|
912 break;
|
|
|
913 default:
|
|
|
914 state = sw_usual;
|
|
|
915 *u++ = ch;
|
|
|
916 break;
|
|
|
917 }
|
|
|
918 ch = *p++;
|
|
|
919 break;
|
|
|
920 #endif
|
|
|
921
|
|
|
922 case sw_quoted:
|
|
|
923 if (ch >= '0' && ch <= '9') {
|
|
|
924 decoded = (u_char) (ch - '0');
|
|
|
925 state = sw_quoted_second;
|
|
|
926 ch = *p++;
|
|
|
927 break;
|
|
|
928 }
|
|
|
929
|
|
|
930 c = (u_char) (ch | 0x20);
|
|
|
931 if (c >= 'a' && c <= 'f') {
|
|
|
932 decoded = (u_char) (c - 'a' + 10);
|
|
|
933 state = sw_quoted_second;
|
|
|
934 ch = *p++;
|
|
|
935 break;
|
|
|
936 }
|
|
|
937
|
|
|
938 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
939
|
|
|
940 case sw_quoted_second:
|
|
|
941 if (ch >= '0' && ch <= '9') {
|
|
|
942 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
|
943 if (ch == '%') {
|
|
|
944 state = sw_usual;
|
|
|
945 *u++ = ch;
|
|
|
946 ch = *p++;
|
|
|
947 break;
|
|
|
948 }
|
|
|
949 state = quoted_state;
|
|
|
950 break;
|
|
|
951 }
|
|
|
952
|
|
|
953 c = (u_char) (ch | 0x20);
|
|
|
954 if (c >= 'a' && c <= 'f') {
|
|
|
955 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
|
956 if (ch == '%') {
|
|
|
957 state = sw_usual;
|
|
|
958 *u++ = ch;
|
|
|
959 ch = *p++;
|
|
|
960 break;
|
|
|
961 }
|
|
|
962 state = quoted_state;
|
|
|
963 break;
|
|
|
964 }
|
|
|
965
|
|
|
966 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
967 }
|
|
|
968 }
|
|
|
969
|
|
|
970 r->uri.len = u - r->uri.data;
|
|
|
971 r->uri.data[r->uri.len] = '\0';
|
|
|
972
|
|
|
973 if (r->uri_ext) {
|
|
|
974 r->exten.len = u - r->uri_ext;
|
|
10
|
975 r->exten.data = r->uri_ext;
|
|
0
|
976 }
|
|
|
977
|
|
|
978 r->uri_ext = NULL;
|
|
|
979
|
|
|
980 return NGX_OK;
|
|
|
981 }
|
