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