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