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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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34
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232 case '+':
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233 r->plus_in_uri = 1;
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234 break;
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0
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235 case '?':
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28
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236 r->args_start = p + 1;
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0
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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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28
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249 r->uri_end = p;
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0
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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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28
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254 r->uri_end = p;
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0
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255 r->http_minor = 9;
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28
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256 goto done;
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0
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257 case ' ':
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28
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258 r->uri_end = p;
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0
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259 state = sw_http_09;
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260 break;
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261 case '.':
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28
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262 r->uri_ext = p + 1;
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0
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263 break;
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10
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264 #if (NGX_WIN32)
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265 case '\\':
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266 r->complex_uri = 1;
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267 state = sw_after_slash_in_uri;
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268 break;
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269 #endif
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0
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270 case '/':
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271 r->uri_ext = NULL;
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272 state = sw_after_slash_in_uri;
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273 break;
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34
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274 case '+':
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275 r->plus_in_uri = 1;
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276 break;
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0
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277 case '%':
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2
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278 r->quoted_uri = 1;
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0
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279 state = sw_uri;
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280 break;
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281 case '?':
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28
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282 r->args_start = p + 1;
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0
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283 state = sw_uri;
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284 break;
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285 }
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286 break;
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287
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288 /* URI */
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289 case sw_uri:
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290 switch (ch) {
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291 case CR:
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28
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292 r->uri_end = p;
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0
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293 r->http_minor = 9;
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294 state = sw_almost_done;
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295 break;
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296 case LF:
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28
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297 r->uri_end = p;
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0
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298 r->http_minor = 9;
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28
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299 goto done;
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34
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300 case '+':
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301 r->plus_in_uri = 1;
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302 break;
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0
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303 case ' ':
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28
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304 r->uri_end = p;
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0
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305 state = sw_http_09;
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306 break;
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307 }
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308 break;
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309
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310 /* space+ after URI */
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311 case sw_http_09:
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312 switch (ch) {
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313 case ' ':
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314 break;
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315 case CR:
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316 r->http_minor = 9;
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317 state = sw_almost_done;
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318 break;
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319 case LF:
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320 r->http_minor = 9;
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28
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321 goto done;
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0
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322 case 'H':
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28
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323 r->http_protocol.data = p;
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0
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324 state = sw_http_H;
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325 break;
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326 default:
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327 return NGX_HTTP_PARSE_INVALID_REQUEST;
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328 }
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329 break;
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330
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331 case sw_http_H:
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332 switch (ch) {
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333 case 'T':
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334 state = sw_http_HT;
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335 break;
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336 default:
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337 return NGX_HTTP_PARSE_INVALID_REQUEST;
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338 }
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339 break;
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340
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341 case sw_http_HT:
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342 switch (ch) {
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343 case 'T':
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344 state = sw_http_HTT;
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345 break;
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346 default:
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347 return NGX_HTTP_PARSE_INVALID_REQUEST;
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348 }
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349 break;
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350
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351 case sw_http_HTT:
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352 switch (ch) {
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353 case 'P':
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354 state = sw_http_HTTP;
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355 break;
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356 default:
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357 return NGX_HTTP_PARSE_INVALID_REQUEST;
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358 }
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359 break;
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360
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361 case sw_http_HTTP:
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362 switch (ch) {
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363 case '/':
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364 state = sw_first_major_digit;
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365 break;
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366 default:
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367 return NGX_HTTP_PARSE_INVALID_REQUEST;
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368 }
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369 break;
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370
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371 /* first digit of major HTTP version */
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372 case sw_first_major_digit:
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373 if (ch < '1' || ch > '9') {
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374 return NGX_HTTP_PARSE_INVALID_REQUEST;
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375 }
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376
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377 r->http_major = ch - '0';
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378 state = sw_major_digit;
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379 break;
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380
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381 /* major HTTP version or dot */
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382 case sw_major_digit:
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383 if (ch == '.') {
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384 state = sw_first_minor_digit;
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385 break;
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386 }
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387
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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_major = r->http_major * 10 + ch - '0';
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393 break;
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394
|
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395 /* first digit of minor HTTP version */
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396 case sw_first_minor_digit:
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397 if (ch < '0' || ch > '9') {
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398 return NGX_HTTP_PARSE_INVALID_REQUEST;
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399 }
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400
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|
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401 r->http_minor = ch - '0';
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402 state = sw_minor_digit;
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403 break;
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404
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405 /* minor HTTP version or end of request line */
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406 case sw_minor_digit:
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407 if (ch == CR) {
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408 state = sw_almost_done;
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409 break;
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410 }
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411
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|
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412 if (ch == LF) {
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28
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413 goto done;
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0
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414 }
|
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415
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|
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416 if (ch < '0' || ch > '9') {
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417 return NGX_HTTP_PARSE_INVALID_REQUEST;
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418 }
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419
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|
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420 r->http_minor = r->http_minor * 10 + ch - '0';
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421 break;
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422
|
|
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423 /* end of request line */
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424 case sw_almost_done:
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28
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425 r->request_end = p - 1;
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0
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426 switch (ch) {
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427 case LF:
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28
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428 goto done;
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0
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429 default:
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430 return NGX_HTTP_PARSE_INVALID_REQUEST;
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431 }
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432 break;
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433 }
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434 }
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435
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|
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436 b->pos = p;
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28
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437 r->state = state;
|
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0
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438
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28
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439 return NGX_AGAIN;
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0
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440
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28
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441 done:
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442
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|
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443 b->pos = p + 1;
|
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0
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444
|
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28
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445 if (r->request_end == NULL) {
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446 r->request_end = p;
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447 }
|
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0
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448
|
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28
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449 r->http_version = r->http_major * 1000 + r->http_minor;
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|
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450 r->state = sw_start;
|
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0
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451
|
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28
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452 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
|
|
|
453 return NGX_HTTP_PARSE_INVALID_09_METHOD;
|
|
0
|
454 }
|
|
28
|
455
|
|
|
456 return NGX_OK;
|
|
0
|
457 }
|
|
|
458
|
|
|
459
|
|
|
460 ngx_int_t ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
|
|
461 {
|
|
|
462 u_char c, ch, *p;
|
|
|
463 enum {
|
|
|
464 sw_start = 0,
|
|
|
465 sw_name,
|
|
|
466 sw_space_before_value,
|
|
|
467 sw_value,
|
|
|
468 sw_space_after_value,
|
|
|
469 sw_almost_done,
|
|
|
470 sw_header_almost_done,
|
|
28
|
471 sw_ignore_line
|
|
0
|
472 } state;
|
|
|
473
|
|
|
474 state = r->state;
|
|
|
475
|
|
28
|
476 for (p = b->pos; p < b->last; p++) {
|
|
|
477 ch = *p;
|
|
0
|
478
|
|
|
479 switch (state) {
|
|
|
480
|
|
|
481 /* first char */
|
|
|
482 case sw_start:
|
|
|
483 switch (ch) {
|
|
|
484 case CR:
|
|
28
|
485 r->header_end = p;
|
|
0
|
486 state = sw_header_almost_done;
|
|
|
487 break;
|
|
|
488 case LF:
|
|
28
|
489 r->header_end = p;
|
|
|
490 goto header_done;
|
|
0
|
491 default:
|
|
|
492 state = sw_name;
|
|
28
|
493 r->header_name_start = p;
|
|
0
|
494
|
|
|
495 c = (u_char) (ch | 0x20);
|
|
|
496 if (c >= 'a' && c <= 'z') {
|
|
|
497 break;
|
|
|
498 }
|
|
|
499
|
|
|
500 if (ch == '-' || ch == '_' || ch == '~' || ch == '.') {
|
|
|
501 break;
|
|
|
502 }
|
|
|
503
|
|
|
504 if (ch >= '0' && ch <= '9') {
|
|
|
505 break;
|
|
|
506 }
|
|
|
507
|
|
|
508 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
509
|
|
|
510 }
|
|
|
511 break;
|
|
|
512
|
|
|
513 /* header name */
|
|
|
514 case sw_name:
|
|
|
515 c = (u_char) (ch | 0x20);
|
|
|
516 if (c >= 'a' && c <= 'z') {
|
|
|
517 break;
|
|
|
518 }
|
|
|
519
|
|
|
520 if (ch == ':') {
|
|
28
|
521 r->header_name_end = p;
|
|
0
|
522 state = sw_space_before_value;
|
|
|
523 break;
|
|
|
524 }
|
|
|
525
|
|
|
526 if (ch == '-' || ch == '_' || ch == '~' || ch == '.') {
|
|
|
527 break;
|
|
|
528 }
|
|
|
529
|
|
|
530 if (ch >= '0' && ch <= '9') {
|
|
|
531 break;
|
|
|
532 }
|
|
|
533
|
|
2
|
534 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
|
0
|
535 if (ch == '/'
|
|
|
536 && r->proxy
|
|
28
|
537 && p - r->header_start == 4
|
|
0
|
538 && ngx_strncmp(r->header_start, "HTTP", 4) == 0)
|
|
|
539 {
|
|
|
540 state = sw_ignore_line;
|
|
|
541 break;
|
|
|
542 }
|
|
|
543
|
|
|
544 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
545
|
|
|
546 /* space* before header value */
|
|
|
547 case sw_space_before_value:
|
|
|
548 switch (ch) {
|
|
|
549 case ' ':
|
|
|
550 break;
|
|
|
551 case CR:
|
|
28
|
552 r->header_start = r->header_end = p;
|
|
0
|
553 state = sw_almost_done;
|
|
|
554 break;
|
|
|
555 case LF:
|
|
28
|
556 r->header_start = r->header_end = p;
|
|
|
557 goto done;
|
|
0
|
558 default:
|
|
28
|
559 r->header_start = p;
|
|
0
|
560 state = sw_value;
|
|
|
561 break;
|
|
|
562 }
|
|
|
563 break;
|
|
|
564
|
|
|
565 /* header value */
|
|
|
566 case sw_value:
|
|
|
567 switch (ch) {
|
|
|
568 case ' ':
|
|
28
|
569 r->header_end = p;
|
|
0
|
570 state = sw_space_after_value;
|
|
|
571 break;
|
|
|
572 case CR:
|
|
28
|
573 r->header_end = p;
|
|
0
|
574 state = sw_almost_done;
|
|
|
575 break;
|
|
|
576 case LF:
|
|
28
|
577 r->header_end = p;
|
|
|
578 goto done;
|
|
0
|
579 }
|
|
|
580 break;
|
|
|
581
|
|
|
582 /* space* before end of header line */
|
|
|
583 case sw_space_after_value:
|
|
|
584 switch (ch) {
|
|
|
585 case ' ':
|
|
|
586 break;
|
|
|
587 case CR:
|
|
|
588 state = sw_almost_done;
|
|
|
589 break;
|
|
|
590 case LF:
|
|
28
|
591 goto done;
|
|
0
|
592 default:
|
|
|
593 state = sw_value;
|
|
|
594 break;
|
|
|
595 }
|
|
|
596 break;
|
|
|
597
|
|
|
598 /* ignore header line */
|
|
|
599 case sw_ignore_line:
|
|
|
600 switch (ch) {
|
|
|
601 case LF:
|
|
|
602 state = sw_start;
|
|
|
603 break;
|
|
|
604 default:
|
|
|
605 break;
|
|
|
606 }
|
|
|
607 break;
|
|
|
608
|
|
|
609 /* end of header line */
|
|
|
610 case sw_almost_done:
|
|
|
611 switch (ch) {
|
|
|
612 case LF:
|
|
28
|
613 goto done;
|
|
0
|
614 default:
|
|
|
615 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
616 }
|
|
|
617 break;
|
|
|
618
|
|
|
619 /* end of header */
|
|
|
620 case sw_header_almost_done:
|
|
|
621 switch (ch) {
|
|
|
622 case LF:
|
|
28
|
623 goto header_done;
|
|
0
|
624 default:
|
|
|
625 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
|
626 }
|
|
|
627 break;
|
|
|
628 }
|
|
|
629 }
|
|
|
630
|
|
|
631 b->pos = p;
|
|
28
|
632 r->state = state;
|
|
0
|
633
|
|
28
|
634 return NGX_AGAIN;
|
|
|
635
|
|
|
636 done:
|
|
|
637
|
|
|
638 b->pos = p + 1;
|
|
|
639 r->state = sw_start;
|
|
0
|
640
|
|
28
|
641 return NGX_OK;
|
|
|
642
|
|
|
643 header_done:
|
|
0
|
644
|
|
28
|
645 b->pos = p + 1;
|
|
|
646 r->state = sw_start;
|
|
|
647
|
|
|
648 return NGX_HTTP_PARSE_HEADER_DONE;
|
|
0
|
649 }
|
|
|
650
|
|
|
651
|
|
|
652 ngx_int_t ngx_http_parse_complex_uri(ngx_http_request_t *r)
|
|
|
653 {
|
|
|
654 u_char c, ch, decoded, *p, *u;
|
|
|
655 enum {
|
|
|
656 sw_usual = 0,
|
|
22
|
657 sw_colon,
|
|
|
658 sw_colon_slash,
|
|
0
|
659 sw_slash,
|
|
|
660 sw_dot,
|
|
|
661 sw_dot_dot,
|
|
10
|
662 #if (NGX_WIN32)
|
|
0
|
663 sw_dot_dot_dot,
|
|
|
664 #endif
|
|
|
665 sw_quoted,
|
|
|
666 sw_quoted_second
|
|
|
667 } state, quoted_state;
|
|
|
668
|
|
28
|
669 #if (NGX_SUPPRESS_WARN)
|
|
0
|
670 decoded = '\0';
|
|
|
671 quoted_state = sw_usual;
|
|
28
|
672 #endif
|
|
0
|
673
|
|
|
674 state = sw_usual;
|
|
|
675 p = r->uri_start;
|
|
|
676 u = r->uri.data;
|
|
|
677 r->uri_ext = NULL;
|
|
10
|
678 r->args_start = NULL;
|
|
0
|
679
|
|
|
680 ch = *p++;
|
|
|
681
|
|
28
|
682 while (p <= r->uri_end) {
|
|
10
|
683
|
|
|
684 /*
|
|
28
|
685 * we use "ch = *p++" inside the cycle, but this operation is safe,
|
|
10
|
686 * because after the URI there is always at least one charcter:
|
|
|
687 * the line feed
|
|
|
688 */
|
|
0
|
689
|
|
|
690 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
10
|
691 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
|
0
|
692
|
|
|
693 switch (state) {
|
|
|
694 case sw_usual:
|
|
|
695 switch(ch) {
|
|
10
|
696 #if (NGX_WIN32)
|
|
|
697 case '\\':
|
|
|
698 r->uri_ext = NULL;
|
|
|
699
|
|
|
700 if (p == r->uri_start + r->uri.len) {
|
|
|
701
|
|
|
702 /*
|
|
|
703 * we omit the last "\" to cause redirect because
|
|
|
704 * the browsers do not treat "\" as "/" in relative URL path
|
|
|
705 */
|
|
|
706
|
|
|
707 break;
|
|
|
708 }
|
|
|
709
|
|
|
710 state = sw_slash;
|
|
|
711 *u++ = '/';
|
|
|
712 break;
|
|
|
713 #endif
|
|
0
|
714 case '/':
|
|
|
715 r->uri_ext = NULL;
|
|
|
716 state = sw_slash;
|
|
|
717 *u++ = ch;
|
|
|
718 break;
|
|
|
719 case '%':
|
|
|
720 quoted_state = state;
|
|
|
721 state = sw_quoted;
|
|
|
722 break;
|
|
10
|
723 case '?':
|
|
|
724 r->args_start = p;
|
|
28
|
725 goto done;
|
|
22
|
726 case ':':
|
|
|
727 state = sw_colon;
|
|
|
728 *u++ = ch;
|
|
|
729 break;
|
|
0
|
730 case '.':
|
|
|
731 r->uri_ext = u + 1;
|
|
22
|
732 *u++ = ch;
|
|
|
733 break;
|
|
0
|
734 default:
|
|
|
735 *u++ = ch;
|
|
|
736 break;
|
|
|
737 }
|
|
|
738 ch = *p++;
|
|
|
739 break;
|
|
|
740
|
|
22
|
741 case sw_colon:
|
|
|
742 switch(ch) {
|
|
|
743 #if (NGX_WIN32)
|
|
|
744 case '\\':
|
|
|
745 state = sw_colon_slash;
|
|
|
746 *u++ = '/';
|
|
|
747 break;
|
|
|
748 #endif
|
|
|
749 case '/':
|
|
|
750 state = sw_colon_slash;
|
|
|
751 *u++ = ch;
|
|
|
752 break;
|
|
|
753 case ':':
|
|
|
754 *u++ = ch;
|
|
|
755 break;
|
|
|
756 case '%':
|
|
|
757 quoted_state = state;
|
|
|
758 state = sw_quoted;
|
|
|
759 break;
|
|
28
|
760 case '?':
|
|
|
761 r->args_start = p;
|
|
|
762 goto done;
|
|
22
|
763 default:
|
|
|
764 state = sw_usual;
|
|
|
765 *u++ = ch;
|
|
|
766 break;
|
|
|
767 }
|
|
|
768 ch = *p++;
|
|
|
769 break;
|
|
|
770
|
|
|
771 case sw_colon_slash:
|
|
|
772 switch(ch) {
|
|
|
773 #if (NGX_WIN32)
|
|
|
774 case '\\':
|
|
|
775 state = sw_slash;
|
|
|
776 *u++ = '/';
|
|
|
777 break;
|
|
|
778 #endif
|
|
|
779 case '/':
|
|
|
780 state = sw_slash;
|
|
|
781 *u++ = ch;
|
|
|
782 break;
|
|
|
783 case '.':
|
|
|
784 state = sw_dot;
|
|
|
785 *u++ = ch;
|
|
|
786 break;
|
|
|
787 case '%':
|
|
|
788 quoted_state = state;
|
|
|
789 state = sw_quoted;
|
|
|
790 break;
|
|
28
|
791 case '?':
|
|
|
792 r->args_start = p;
|
|
|
793 goto done;
|
|
22
|
794 default:
|
|
|
795 state = sw_usual;
|
|
|
796 *u++ = ch;
|
|
|
797 break;
|
|
|
798 }
|
|
|
799 ch = *p++;
|
|
|
800 break;
|
|
|
801
|
|
0
|
802 case sw_slash:
|
|
|
803 switch(ch) {
|
|
10
|
804 #if (NGX_WIN32)
|
|
|
805 case '\\':
|
|
|
806 break;
|
|
|
807 #endif
|
|
0
|
808 case '/':
|
|
|
809 break;
|
|
|
810 case '.':
|
|
|
811 state = sw_dot;
|
|
|
812 *u++ = ch;
|
|
|
813 break;
|
|
|
814 case '%':
|
|
|
815 quoted_state = state;
|
|
|
816 state = sw_quoted;
|
|
|
817 break;
|
|
28
|
818 case '?':
|
|
|
819 r->args_start = p;
|
|
|
820 goto done;
|
|
0
|
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;
|
|
28
|
847 case '?':
|
|
|
848 r->args_start = p;
|
|
|
849 goto done;
|
|
0
|
850 default:
|
|
|
851 state = sw_usual;
|
|
|
852 *u++ = ch;
|
|
|
853 break;
|
|
|
854 }
|
|
|
855 ch = *p++;
|
|
|
856 break;
|
|
|
857
|
|
|
858 case sw_dot_dot:
|
|
|
859 switch(ch) {
|
|
10
|
860 #if (NGX_WIN32)
|
|
|
861 case '\\':
|
|
|
862 /* fall through */
|
|
|
863 #endif
|
|
0
|
864 case '/':
|
|
|
865 state = sw_slash;
|
|
|
866 u -= 4;
|
|
|
867 if (u < r->uri.data) {
|
|
|
868 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
869 }
|
|
|
870 while (*(u - 1) != '/') {
|
|
|
871 u--;
|
|
|
872 }
|
|
|
873 break;
|
|
|
874 case '%':
|
|
|
875 quoted_state = state;
|
|
|
876 state = sw_quoted;
|
|
|
877 break;
|
|
28
|
878 case '?':
|
|
|
879 r->args_start = p;
|
|
|
880 goto done;
|
|
10
|
881 #if (NGX_WIN32)
|
|
0
|
882 case '.':
|
|
|
883 state = sw_dot_dot_dot;
|
|
|
884 *u++ = ch;
|
|
|
885 break;
|
|
|
886 #endif
|
|
|
887 default:
|
|
|
888 state = sw_usual;
|
|
|
889 *u++ = ch;
|
|
|
890 break;
|
|
|
891 }
|
|
|
892 ch = *p++;
|
|
|
893 break;
|
|
|
894
|
|
10
|
895 #if (NGX_WIN32)
|
|
0
|
896 case sw_dot_dot_dot:
|
|
|
897 switch(ch) {
|
|
10
|
898 case '\\':
|
|
0
|
899 case '/':
|
|
|
900 state = sw_slash;
|
|
|
901 u -= 5;
|
|
|
902 if (u < r->uri.data) {
|
|
|
903 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
904 }
|
|
|
905 while (*u != '/') {
|
|
|
906 u--;
|
|
|
907 }
|
|
|
908 if (u < r->uri.data) {
|
|
|
909 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
910 }
|
|
|
911 while (*(u - 1) != '/') {
|
|
|
912 u--;
|
|
|
913 }
|
|
|
914 break;
|
|
|
915 case '%':
|
|
|
916 quoted_state = state;
|
|
|
917 state = sw_quoted;
|
|
|
918 break;
|
|
|
919 default:
|
|
|
920 state = sw_usual;
|
|
|
921 *u++ = ch;
|
|
|
922 break;
|
|
|
923 }
|
|
|
924 ch = *p++;
|
|
|
925 break;
|
|
|
926 #endif
|
|
|
927
|
|
|
928 case sw_quoted:
|
|
|
929 if (ch >= '0' && ch <= '9') {
|
|
|
930 decoded = (u_char) (ch - '0');
|
|
|
931 state = sw_quoted_second;
|
|
|
932 ch = *p++;
|
|
|
933 break;
|
|
|
934 }
|
|
|
935
|
|
|
936 c = (u_char) (ch | 0x20);
|
|
|
937 if (c >= 'a' && c <= 'f') {
|
|
|
938 decoded = (u_char) (c - 'a' + 10);
|
|
|
939 state = sw_quoted_second;
|
|
|
940 ch = *p++;
|
|
|
941 break;
|
|
|
942 }
|
|
|
943
|
|
|
944 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
945
|
|
|
946 case sw_quoted_second:
|
|
|
947 if (ch >= '0' && ch <= '9') {
|
|
|
948 ch = (u_char) ((decoded << 4) + ch - '0');
|
|
|
949 if (ch == '%') {
|
|
|
950 state = sw_usual;
|
|
|
951 *u++ = ch;
|
|
|
952 ch = *p++;
|
|
|
953 break;
|
|
|
954 }
|
|
|
955 state = quoted_state;
|
|
|
956 break;
|
|
|
957 }
|
|
|
958
|
|
|
959 c = (u_char) (ch | 0x20);
|
|
|
960 if (c >= 'a' && c <= 'f') {
|
|
|
961 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
|
28
|
962 if (ch == '?') {
|
|
0
|
963 *u++ = ch;
|
|
|
964 ch = *p++;
|
|
|
965 }
|
|
|
966 state = quoted_state;
|
|
|
967 break;
|
|
|
968 }
|
|
|
969
|
|
|
970 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
|
971 }
|
|
|
972 }
|
|
|
973
|
|
28
|
974 done:
|
|
|
975
|
|
0
|
976 r->uri.len = u - r->uri.data;
|
|
|
977 r->uri.data[r->uri.len] = '\0';
|
|
|
978
|
|
|
979 if (r->uri_ext) {
|
|
|
980 r->exten.len = u - r->uri_ext;
|
|
10
|
981 r->exten.data = r->uri_ext;
|
|
0
|
982 }
|
|
|
983
|
|
|
984 r->uri_ext = NULL;
|
|
|
985
|
|
|
986 return NGX_OK;
|
|
|
987 }
|
