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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254
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12 static uint32_t usual[] = {
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13 0xffffdbfe, /* 1111 1111 1111 1111 1101 1011 1111 1110 */
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14
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15 /* ?>=< ;:98 7654 3210 /.-, +*)( '&%$ #"! */
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16 0x7fff37d6, /* 0111 1111 1111 1111 0011 0111 1101 0110 */
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17
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18 /* _^]\ [ZYX WVUT SRQP ONML KJIH GFED CBA@ */
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19 #if (NGX_WIN32)
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20 0xefffffff, /* 1110 1111 1111 1111 1111 1111 1111 1111 */
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21 #else
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22 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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23 #endif
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24
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25 /* ~}| {zyx wvut srqp onml kjih gfed cba` */
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26 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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27
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28 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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29 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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30 0xffffffff, /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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31 0xffffffff /* 1111 1111 1111 1111 1111 1111 1111 1111 */
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32 };
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33
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34
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300
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35 #if (NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED)
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36
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37 #define ngx_str3_cmp(m, c0, c1, c2, c3) \
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38 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
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39
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40 #define ngx_str3Ocmp(m, c0, c1, c2, c3) \
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41 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
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42
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43 #define ngx_str4cmp(m, c0, c1, c2, c3) \
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44 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0)
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45
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46 #define ngx_str5cmp(m, c0, c1, c2, c3, c4) \
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47 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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48 && m[4] == c4
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49
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50 #define ngx_str6cmp(m, c0, c1, c2, c3, c4, c5) \
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51 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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52 && (((uint32_t *) m)[1] & 0xffff) == ((c5 << 8) | c4)
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53
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54 #define ngx_str7_cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
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55 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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56 && ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)
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57
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58 #define ngx_str8cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
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59 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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60 && ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4)
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61
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62 #define ngx_str9cmp(m, c0, c1, c2, c3, c4, c5, c6, c7, c8) \
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63 *(uint32_t *) m == ((c3 << 24) | (c2 << 16) | (c1 << 8) | c0) \
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64 && ((uint32_t *) m)[1] == ((c7 << 24) | (c6 << 16) | (c5 << 8) | c4) \
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65 && m[8] == c8
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66
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67 #else /* !(NGX_HAVE_LITTLE_ENDIAN && NGX_HAVE_NONALIGNED) */
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68
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69 #define ngx_str3_cmp(m, c0, c1, c2, c3) \
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70 m[0] == c0 && m[1] == c1 && m[2] == c2
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71
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72 #define ngx_str3Ocmp(m, c0, c1, c2, c3) \
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73 m[0] == c0 && m[2] == c2 && m[3] == c3
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74
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75 #define ngx_str4cmp(m, c0, c1, c2, c3) \
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76 m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3
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77
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78 #define ngx_str5cmp(m, c0, c1, c2, c3, c4) \
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79 m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 && m[4] == c4
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80
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81 #define ngx_str6cmp(m, c0, c1, c2, c3, c4, c5) \
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82 m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
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83 && m[4] == c4 && m[5] == c5
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84
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85 #define ngx_str7_cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
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86 m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
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87 && m[4] == c4 && m[5] == c5 && m[6] == c6
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88
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89 #define ngx_str8cmp(m, c0, c1, c2, c3, c4, c5, c6, c7) \
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90 m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
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91 && m[4] == c4 && m[5] == c5 && m[6] == c6 && m[7] == c7
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92
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93 #define ngx_str9cmp(m, c0, c1, c2, c3, c4, c5, c6, c7, c8) \
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94 m[0] == c0 && m[1] == c1 && m[2] == c2 && m[3] == c3 \
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95 && m[4] == c4 && m[5] == c5 && m[6] == c6 && m[7] == c7 && m[8] == c8
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96
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97 #endif
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98
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99
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198
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100 /* gcc, icc, msvc and others compile these switches as an jump table */
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101
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58
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102 ngx_int_t
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103 ngx_http_parse_request_line(ngx_http_request_t *r, ngx_buf_t *b)
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0
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104 {
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56
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105 u_char c, ch, *p, *m;
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0
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106 enum {
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107 sw_start = 0,
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108 sw_method,
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109 sw_spaces_before_uri,
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110 sw_schema,
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111 sw_schema_slash,
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112 sw_schema_slash_slash,
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113 sw_host,
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114 sw_port,
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115 sw_after_slash_in_uri,
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116 sw_check_uri,
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117 sw_uri,
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118 sw_http_09,
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119 sw_http_H,
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120 sw_http_HT,
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121 sw_http_HTT,
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122 sw_http_HTTP,
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123 sw_first_major_digit,
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124 sw_major_digit,
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125 sw_first_minor_digit,
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126 sw_minor_digit,
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344
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127 sw_spaces_after_digit,
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28
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128 sw_almost_done
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0
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129 } state;
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130
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131 state = r->state;
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132
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28
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133 for (p = b->pos; p < b->last; p++) {
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134 ch = *p;
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0
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135
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136 switch (state) {
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137
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138 /* HTTP methods: GET, HEAD, POST */
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139 case sw_start:
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28
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140 r->request_start = p;
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0
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141
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142 if (ch == CR || ch == LF) {
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143 break;
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144 }
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145
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146 if (ch < 'A' || ch > 'Z') {
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147 return NGX_HTTP_PARSE_INVALID_METHOD;
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148 }
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149
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150 state = sw_method;
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151 break;
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152
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153 case sw_method:
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154 if (ch == ' ') {
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58
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155 r->method_end = p - 1;
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0
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156 m = r->request_start;
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157
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188
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158 switch (p - m) {
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0
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159
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188
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160 case 3:
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300
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161 if (ngx_str3_cmp(m, 'G', 'E', 'T', ' ')) {
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0
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162 r->method = NGX_HTTP_GET;
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256
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163 break;
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164 }
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182
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165
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300
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166 if (ngx_str3_cmp(m, 'P', 'U', 'T', ' ')) {
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182
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167 r->method = NGX_HTTP_PUT;
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256
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168 break;
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0
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169 }
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256
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170
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188
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171 break;
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0
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172
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188
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173 case 4:
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256
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174 if (m[1] == 'O') {
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175
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300
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176 if (ngx_str3Ocmp(m, 'P', 'O', 'S', 'T')) {
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256
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177 r->method = NGX_HTTP_POST;
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178 break;
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179 }
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180
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300
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181 if (ngx_str3Ocmp(m, 'C', 'O', 'P', 'Y')) {
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256
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182 r->method = NGX_HTTP_COPY;
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183 break;
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184 }
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0
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185
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300
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186 if (ngx_str3Ocmp(m, 'M', 'O', 'V', 'E')) {
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256
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187 r->method = NGX_HTTP_MOVE;
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188 break;
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189 }
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190
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300
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191 if (ngx_str3Ocmp(m, 'L', 'O', 'C', 'K')) {
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256
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192 r->method = NGX_HTTP_LOCK;
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193 break;
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194 }
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195
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196 } else {
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197
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300
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198 if (ngx_str4cmp(m, 'H', 'E', 'A', 'D')) {
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256
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199 r->method = NGX_HTTP_HEAD;
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200 break;
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201 }
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0
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202 }
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256
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203
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188
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204 break;
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182
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205
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188
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206 case 5:
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300
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207 if (ngx_str5cmp(m, 'M', 'K', 'C', 'O', 'L')) {
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186
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208 r->method = NGX_HTTP_MKCOL;
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209 }
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256
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210
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300
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211 if (ngx_str5cmp(m, 'T', 'R', 'A', 'C', 'E')) {
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294
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212 r->method = NGX_HTTP_TRACE;
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213 }
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214
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188
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215 break;
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186
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216
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188
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217 case 6:
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300
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218 if (ngx_str6cmp(m, 'D', 'E', 'L', 'E', 'T', 'E')) {
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182
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219 r->method = NGX_HTTP_DELETE;
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256
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220 break;
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182
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221 }
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256
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222
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300
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223 if (ngx_str6cmp(m, 'U', 'N', 'L', 'O', 'C', 'K')) {
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256
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224 r->method = NGX_HTTP_UNLOCK;
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225 break;
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226 }
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227
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228 break;
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229
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230 case 7:
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300
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231 if (ngx_str7_cmp(m, 'O', 'P', 'T', 'I', 'O', 'N', 'S', ' '))
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256
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232 {
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233 r->method = NGX_HTTP_OPTIONS;
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234 }
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235
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236 break;
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237
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238 case 8:
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300
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239 if (ngx_str8cmp(m, 'P', 'R', 'O', 'P', 'F', 'I', 'N', 'D'))
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256
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240 {
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241 r->method = NGX_HTTP_PROPFIND;
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242 }
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243
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244 break;
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245
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246 case 9:
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300
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247 if (ngx_str9cmp(m,
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248 'P', 'R', 'O', 'P', 'P', 'A', 'T', 'C', 'H'))
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256
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249 {
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250 r->method = NGX_HTTP_PROPPATCH;
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251 }
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252
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188
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253 break;
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0
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254 }
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255
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256 state = sw_spaces_before_uri;
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257 break;
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258 }
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259
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260 if (ch < 'A' || ch > 'Z') {
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261 return NGX_HTTP_PARSE_INVALID_METHOD;
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262 }
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263
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264 break;
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265
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266 /* space* before URI */
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267 case sw_spaces_before_uri:
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56
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268
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254
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269 if (ch == '/' ){
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270 r->uri_start = p;
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271 state = sw_after_slash_in_uri;
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272 break;
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273 }
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274
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56
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275 c = (u_char) (ch | 0x20);
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70
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276 if (c >= 'a' && c <= 'z') {
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38
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277 r->schema_start = p;
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278 state = sw_schema;
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279 break;
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280 }
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281
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0
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282 switch (ch) {
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283 case ' ':
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284 break;
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285 default:
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286 return NGX_HTTP_PARSE_INVALID_REQUEST;
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287 }
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288 break;
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289
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290 case sw_schema:
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56
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291
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292 c = (u_char) (ch | 0x20);
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70
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293 if (c >= 'a' && c <= 'z') {
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38
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294 break;
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295 }
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296
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0
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297 switch (ch) {
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298 case ':':
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28
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299 r->schema_end = p;
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0
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300 state = sw_schema_slash;
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301 break;
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302 default:
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303 return NGX_HTTP_PARSE_INVALID_REQUEST;
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304 }
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305 break;
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306
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307 case sw_schema_slash:
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308 switch (ch) {
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309 case '/':
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310 state = sw_schema_slash_slash;
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311 break;
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312 default:
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313 return NGX_HTTP_PARSE_INVALID_REQUEST;
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314 }
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315 break;
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316
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317 case sw_schema_slash_slash:
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318 switch (ch) {
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319 case '/':
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258
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320 r->host_start = p + 1;
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0
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321 state = sw_host;
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322 break;
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323 default:
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324 return NGX_HTTP_PARSE_INVALID_REQUEST;
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325 }
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326 break;
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327
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328 case sw_host:
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56
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329
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330 c = (u_char) (ch | 0x20);
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70
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331 if (c >= 'a' && c <= 'z') {
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56
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332 break;
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333 }
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334
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254
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335 if ((ch >= '0' && ch <= '9') || ch == '.' || ch == '-') {
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38
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336 break;
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337 }
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338
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342
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339 r->host_end = p;
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340
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0
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341 switch (ch) {
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342 case ':':
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343 state = sw_port;
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344 break;
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345 case '/':
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28
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346 r->uri_start = p;
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0
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347 state = sw_after_slash_in_uri;
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348 break;
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342
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349 case ' ':
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350 /*
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351 * use single "/" from request line to preserve pointers,
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352 * if request line will be copied to large client buffer
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353 */
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354 r->uri_start = r->schema_end + 1;
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355 r->uri_end = r->schema_end + 2;
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356 state = sw_http_09;
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357 break;
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0
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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_port:
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38
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364 if (ch >= '0' && ch <= '9') {
|
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365 break;
|
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366 }
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367
|
0
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368 switch (ch) {
|
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369 case '/':
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28
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370 r->port_end = p;
|
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371 r->uri_start = p;
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0
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372 state = sw_after_slash_in_uri;
|
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373 break;
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342
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374 case ' ':
|
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375 r->port_end = p;
|
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376 /*
|
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377 * use single "/" from request line to preserve pointers,
|
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378 * if request line will be copied to large client buffer
|
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379 */
|
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380 r->uri_start = r->schema_end + 1;
|
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381 r->uri_end = r->schema_end + 2;
|
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382 state = sw_http_09;
|
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383 break;
|
0
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384 default:
|
38
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385 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
0
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386 }
|
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387 break;
|
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388
|
10
|
389 /* check "/.", "//", "%", and "\" (Win32) in URI */
|
0
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390 case sw_after_slash_in_uri:
|
38
|
391
|
254
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392 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
38
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393 state = sw_check_uri;
|
|
394 break;
|
|
395 }
|
|
396
|
0
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397 switch (ch) {
|
38
|
398 case ' ':
|
|
399 r->uri_end = p;
|
|
400 state = sw_http_09;
|
|
401 break;
|
0
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402 case CR:
|
28
|
403 r->uri_end = p;
|
0
|
404 r->http_minor = 9;
|
|
405 state = sw_almost_done;
|
|
406 break;
|
|
407 case LF:
|
28
|
408 r->uri_end = p;
|
0
|
409 r->http_minor = 9;
|
28
|
410 goto done;
|
0
|
411 case '.':
|
2
|
412 r->complex_uri = 1;
|
|
413 state = sw_uri;
|
|
414 break;
|
0
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415 case '%':
|
2
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416 r->quoted_uri = 1;
|
0
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417 state = sw_uri;
|
|
418 break;
|
38
|
419 case '/':
|
|
420 r->complex_uri = 1;
|
|
421 state = sw_uri;
|
|
422 break;
|
10
|
423 #if (NGX_WIN32)
|
|
424 case '\\':
|
|
425 r->complex_uri = 1;
|
38
|
426 state = sw_uri;
|
10
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427 break;
|
|
428 #endif
|
38
|
429 case '?':
|
|
430 r->args_start = p + 1;
|
|
431 state = sw_uri;
|
0
|
432 break;
|
254
|
433 case '#':
|
|
434 r->complex_uri = 1;
|
|
435 state = sw_uri;
|
|
436 break;
|
34
|
437 case '+':
|
|
438 r->plus_in_uri = 1;
|
|
439 break;
|
38
|
440 case '\0':
|
|
441 r->zero_in_uri = 1;
|
0
|
442 break;
|
|
443 default:
|
|
444 state = sw_check_uri;
|
|
445 break;
|
|
446 }
|
|
447 break;
|
|
448
|
10
|
449 /* check "/", "%" and "\" (Win32) in URI */
|
0
|
450 case sw_check_uri:
|
38
|
451
|
254
|
452 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
38
|
453 break;
|
|
454 }
|
|
455
|
0
|
456 switch (ch) {
|
38
|
457 case '/':
|
|
458 r->uri_ext = NULL;
|
|
459 state = sw_after_slash_in_uri;
|
|
460 break;
|
|
461 case '.':
|
|
462 r->uri_ext = p + 1;
|
|
463 break;
|
|
464 case ' ':
|
|
465 r->uri_end = p;
|
|
466 state = sw_http_09;
|
|
467 break;
|
0
|
468 case CR:
|
28
|
469 r->uri_end = p;
|
0
|
470 r->http_minor = 9;
|
|
471 state = sw_almost_done;
|
|
472 break;
|
|
473 case LF:
|
28
|
474 r->uri_end = p;
|
0
|
475 r->http_minor = 9;
|
28
|
476 goto done;
|
10
|
477 #if (NGX_WIN32)
|
|
478 case '\\':
|
|
479 r->complex_uri = 1;
|
|
480 state = sw_after_slash_in_uri;
|
|
481 break;
|
|
482 #endif
|
38
|
483 case '%':
|
|
484 r->quoted_uri = 1;
|
|
485 state = sw_uri;
|
0
|
486 break;
|
|
487 case '?':
|
28
|
488 r->args_start = p + 1;
|
0
|
489 state = sw_uri;
|
|
490 break;
|
254
|
491 case '#':
|
|
492 r->complex_uri = 1;
|
|
493 state = sw_uri;
|
|
494 break;
|
206
|
495 case '+':
|
|
496 r->plus_in_uri = 1;
|
|
497 break;
|
38
|
498 case '\0':
|
|
499 r->zero_in_uri = 1;
|
|
500 break;
|
0
|
501 }
|
|
502 break;
|
|
503
|
|
504 /* URI */
|
|
505 case sw_uri:
|
254
|
506
|
|
507 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
508 break;
|
|
509 }
|
|
510
|
0
|
511 switch (ch) {
|
38
|
512 case ' ':
|
|
513 r->uri_end = p;
|
|
514 state = sw_http_09;
|
|
515 break;
|
0
|
516 case CR:
|
28
|
517 r->uri_end = p;
|
0
|
518 r->http_minor = 9;
|
|
519 state = sw_almost_done;
|
|
520 break;
|
|
521 case LF:
|
28
|
522 r->uri_end = p;
|
0
|
523 r->http_minor = 9;
|
28
|
524 goto done;
|
254
|
525 case '#':
|
|
526 r->complex_uri = 1;
|
|
527 break;
|
38
|
528 case '\0':
|
|
529 r->zero_in_uri = 1;
|
0
|
530 break;
|
|
531 }
|
|
532 break;
|
|
533
|
|
534 /* space+ after URI */
|
|
535 case sw_http_09:
|
|
536 switch (ch) {
|
|
537 case ' ':
|
|
538 break;
|
|
539 case CR:
|
|
540 r->http_minor = 9;
|
|
541 state = sw_almost_done;
|
|
542 break;
|
|
543 case LF:
|
|
544 r->http_minor = 9;
|
28
|
545 goto done;
|
0
|
546 case 'H':
|
28
|
547 r->http_protocol.data = p;
|
0
|
548 state = sw_http_H;
|
|
549 break;
|
|
550 default:
|
|
551 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
552 }
|
|
553 break;
|
|
554
|
|
555 case sw_http_H:
|
|
556 switch (ch) {
|
|
557 case 'T':
|
|
558 state = sw_http_HT;
|
|
559 break;
|
|
560 default:
|
|
561 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
562 }
|
|
563 break;
|
|
564
|
|
565 case sw_http_HT:
|
|
566 switch (ch) {
|
|
567 case 'T':
|
|
568 state = sw_http_HTT;
|
|
569 break;
|
|
570 default:
|
|
571 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
572 }
|
|
573 break;
|
|
574
|
|
575 case sw_http_HTT:
|
|
576 switch (ch) {
|
|
577 case 'P':
|
|
578 state = sw_http_HTTP;
|
|
579 break;
|
|
580 default:
|
|
581 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
582 }
|
|
583 break;
|
|
584
|
|
585 case sw_http_HTTP:
|
|
586 switch (ch) {
|
|
587 case '/':
|
|
588 state = sw_first_major_digit;
|
|
589 break;
|
|
590 default:
|
|
591 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
592 }
|
|
593 break;
|
|
594
|
|
595 /* first digit of major HTTP version */
|
|
596 case sw_first_major_digit:
|
|
597 if (ch < '1' || ch > '9') {
|
|
598 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
599 }
|
|
600
|
|
601 r->http_major = ch - '0';
|
|
602 state = sw_major_digit;
|
|
603 break;
|
|
604
|
|
605 /* major HTTP version or dot */
|
|
606 case sw_major_digit:
|
|
607 if (ch == '.') {
|
|
608 state = sw_first_minor_digit;
|
|
609 break;
|
|
610 }
|
|
611
|
|
612 if (ch < '0' || ch > '9') {
|
|
613 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
614 }
|
|
615
|
|
616 r->http_major = r->http_major * 10 + ch - '0';
|
|
617 break;
|
|
618
|
|
619 /* first digit of minor HTTP version */
|
|
620 case sw_first_minor_digit:
|
|
621 if (ch < '0' || ch > '9') {
|
|
622 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
623 }
|
|
624
|
|
625 r->http_minor = ch - '0';
|
|
626 state = sw_minor_digit;
|
|
627 break;
|
|
628
|
|
629 /* minor HTTP version or end of request line */
|
|
630 case sw_minor_digit:
|
|
631 if (ch == CR) {
|
|
632 state = sw_almost_done;
|
|
633 break;
|
|
634 }
|
|
635
|
|
636 if (ch == LF) {
|
28
|
637 goto done;
|
0
|
638 }
|
|
639
|
344
|
640 if (ch == ' ') {
|
|
641 state = sw_spaces_after_digit;
|
|
642 break;
|
|
643 }
|
|
644
|
0
|
645 if (ch < '0' || ch > '9') {
|
|
646 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
647 }
|
|
648
|
|
649 r->http_minor = r->http_minor * 10 + ch - '0';
|
|
650 break;
|
|
651
|
344
|
652 case sw_spaces_after_digit:
|
|
653 switch (ch) {
|
|
654 case ' ':
|
|
655 break;
|
|
656 case CR:
|
|
657 state = sw_almost_done;
|
|
658 break;
|
|
659 case LF:
|
|
660 goto done;
|
|
661 default:
|
|
662 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
663 }
|
|
664 break;
|
|
665
|
0
|
666 /* end of request line */
|
|
667 case sw_almost_done:
|
28
|
668 r->request_end = p - 1;
|
0
|
669 switch (ch) {
|
|
670 case LF:
|
28
|
671 goto done;
|
0
|
672 default:
|
|
673 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
674 }
|
|
675 }
|
|
676 }
|
|
677
|
|
678 b->pos = p;
|
28
|
679 r->state = state;
|
0
|
680
|
28
|
681 return NGX_AGAIN;
|
0
|
682
|
28
|
683 done:
|
|
684
|
|
685 b->pos = p + 1;
|
0
|
686
|
28
|
687 if (r->request_end == NULL) {
|
|
688 r->request_end = p;
|
|
689 }
|
0
|
690
|
28
|
691 r->http_version = r->http_major * 1000 + r->http_minor;
|
|
692 r->state = sw_start;
|
0
|
693
|
28
|
694 if (r->http_version == 9 && r->method != NGX_HTTP_GET) {
|
|
695 return NGX_HTTP_PARSE_INVALID_09_METHOD;
|
0
|
696 }
|
28
|
697
|
|
698 return NGX_OK;
|
0
|
699 }
|
|
700
|
|
701
|
58
|
702 ngx_int_t
|
|
703 ngx_http_parse_header_line(ngx_http_request_t *r, ngx_buf_t *b)
|
0
|
704 {
|
56
|
705 u_char c, ch, *p;
|
198
|
706 ngx_uint_t hash, i;
|
0
|
707 enum {
|
|
708 sw_start = 0,
|
|
709 sw_name,
|
|
710 sw_space_before_value,
|
|
711 sw_value,
|
|
712 sw_space_after_value,
|
52
|
713 sw_ignore_line,
|
0
|
714 sw_almost_done,
|
52
|
715 sw_header_almost_done
|
0
|
716 } state;
|
|
717
|
250
|
718 /* the last '\0' is not needed because string is zero terminated */
|
|
719
|
198
|
720 static u_char lowcase[] =
|
|
721 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
722 "\0\0\0\0\0\0\0\0\0\0\0\0\0-\0\0" "0123456789\0\0\0\0\0\0"
|
|
723 "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0\0"
|
|
724 "\0abcdefghijklmnopqrstuvwxyz\0\0\0\0\0"
|
|
725 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
726 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
727 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
|
|
728 "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0";
|
|
729
|
0
|
730 state = r->state;
|
56
|
731 hash = r->header_hash;
|
198
|
732 i = r->lowcase_index;
|
0
|
733
|
28
|
734 for (p = b->pos; p < b->last; p++) {
|
|
735 ch = *p;
|
0
|
736
|
|
737 switch (state) {
|
|
738
|
|
739 /* first char */
|
|
740 case sw_start:
|
60
|
741 r->invalid_header = 0;
|
|
742
|
0
|
743 switch (ch) {
|
|
744 case CR:
|
28
|
745 r->header_end = p;
|
0
|
746 state = sw_header_almost_done;
|
|
747 break;
|
|
748 case LF:
|
28
|
749 r->header_end = p;
|
|
750 goto header_done;
|
0
|
751 default:
|
|
752 state = sw_name;
|
28
|
753 r->header_name_start = p;
|
0
|
754
|
198
|
755 c = lowcase[ch];
|
0
|
756
|
198
|
757 if (c) {
|
|
758 hash = ngx_hash(0, c);
|
|
759 r->lowcase_header[0] = c;
|
|
760 i = 1;
|
0
|
761 break;
|
|
762 }
|
|
763
|
60
|
764 r->invalid_header = 1;
|
|
765
|
52
|
766 break;
|
0
|
767
|
|
768 }
|
|
769 break;
|
|
770
|
|
771 /* header name */
|
|
772 case sw_name:
|
198
|
773 c = lowcase[ch];
|
|
774
|
|
775 if (c) {
|
|
776 hash = ngx_hash(hash, c);
|
|
777 r->lowcase_header[i++] = c;
|
|
778 i &= ~NGX_HTTP_LC_HEADER_LEN;
|
0
|
779 break;
|
|
780 }
|
|
781
|
|
782 if (ch == ':') {
|
28
|
783 r->header_name_end = p;
|
0
|
784 state = sw_space_before_value;
|
|
785 break;
|
|
786 }
|
|
787
|
58
|
788 if (ch == CR) {
|
|
789 r->header_name_end = p;
|
|
790 r->header_start = p;
|
|
791 r->header_end = p;
|
|
792 state = sw_almost_done;
|
|
793 break;
|
|
794 }
|
|
795
|
|
796 if (ch == LF) {
|
|
797 r->header_name_end = p;
|
|
798 r->header_start = p;
|
|
799 r->header_end = p;
|
|
800 goto done;
|
|
801 }
|
|
802
|
2
|
803 /* IIS may send the duplicate "HTTP/1.1 ..." lines */
|
0
|
804 if (ch == '/'
|
58
|
805 && r->upstream
|
|
806 && p - r->header_name_start == 4
|
|
807 && ngx_strncmp(r->header_name_start, "HTTP", 4) == 0)
|
0
|
808 {
|
|
809 state = sw_ignore_line;
|
|
810 break;
|
|
811 }
|
|
812
|
60
|
813 r->invalid_header = 1;
|
|
814
|
52
|
815 break;
|
0
|
816
|
|
817 /* space* before header value */
|
|
818 case sw_space_before_value:
|
|
819 switch (ch) {
|
|
820 case ' ':
|
|
821 break;
|
|
822 case CR:
|
58
|
823 r->header_start = p;
|
|
824 r->header_end = p;
|
0
|
825 state = sw_almost_done;
|
|
826 break;
|
|
827 case LF:
|
58
|
828 r->header_start = p;
|
|
829 r->header_end = p;
|
28
|
830 goto done;
|
0
|
831 default:
|
28
|
832 r->header_start = p;
|
0
|
833 state = sw_value;
|
|
834 break;
|
|
835 }
|
|
836 break;
|
|
837
|
|
838 /* header value */
|
|
839 case sw_value:
|
|
840 switch (ch) {
|
|
841 case ' ':
|
28
|
842 r->header_end = p;
|
0
|
843 state = sw_space_after_value;
|
|
844 break;
|
|
845 case CR:
|
28
|
846 r->header_end = p;
|
0
|
847 state = sw_almost_done;
|
|
848 break;
|
|
849 case LF:
|
28
|
850 r->header_end = p;
|
|
851 goto done;
|
0
|
852 }
|
|
853 break;
|
|
854
|
|
855 /* space* before end of header line */
|
|
856 case sw_space_after_value:
|
|
857 switch (ch) {
|
|
858 case ' ':
|
|
859 break;
|
|
860 case CR:
|
|
861 state = sw_almost_done;
|
|
862 break;
|
|
863 case LF:
|
28
|
864 goto done;
|
0
|
865 default:
|
|
866 state = sw_value;
|
|
867 break;
|
|
868 }
|
|
869 break;
|
|
870
|
|
871 /* ignore header line */
|
|
872 case sw_ignore_line:
|
|
873 switch (ch) {
|
|
874 case LF:
|
|
875 state = sw_start;
|
|
876 break;
|
|
877 default:
|
|
878 break;
|
|
879 }
|
|
880 break;
|
|
881
|
|
882 /* end of header line */
|
|
883 case sw_almost_done:
|
|
884 switch (ch) {
|
172
|
885 case CR:
|
|
886 break;
|
0
|
887 case LF:
|
28
|
888 goto done;
|
0
|
889 default:
|
|
890 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
891 }
|
174
|
892 break;
|
0
|
893
|
|
894 /* end of header */
|
|
895 case sw_header_almost_done:
|
|
896 switch (ch) {
|
|
897 case LF:
|
28
|
898 goto header_done;
|
0
|
899 default:
|
|
900 return NGX_HTTP_PARSE_INVALID_HEADER;
|
|
901 }
|
|
902 }
|
|
903 }
|
|
904
|
|
905 b->pos = p;
|
28
|
906 r->state = state;
|
56
|
907 r->header_hash = hash;
|
198
|
908 r->lowcase_index = i;
|
0
|
909
|
28
|
910 return NGX_AGAIN;
|
|
911
|
|
912 done:
|
|
913
|
|
914 b->pos = p + 1;
|
|
915 r->state = sw_start;
|
56
|
916 r->header_hash = hash;
|
198
|
917 r->lowcase_index = i;
|
0
|
918
|
28
|
919 return NGX_OK;
|
|
920
|
|
921 header_done:
|
0
|
922
|
28
|
923 b->pos = p + 1;
|
|
924 r->state = sw_start;
|
|
925
|
|
926 return NGX_HTTP_PARSE_HEADER_DONE;
|
0
|
927 }
|
|
928
|
|
929
|
58
|
930 ngx_int_t
|
342
|
931 ngx_http_parse_complex_uri(ngx_http_request_t *r, ngx_uint_t merge_slashes)
|
0
|
932 {
|
|
933 u_char c, ch, decoded, *p, *u;
|
|
934 enum {
|
|
935 sw_usual = 0,
|
|
936 sw_slash,
|
|
937 sw_dot,
|
|
938 sw_dot_dot,
|
10
|
939 #if (NGX_WIN32)
|
0
|
940 sw_dot_dot_dot,
|
|
941 #endif
|
|
942 sw_quoted,
|
|
943 sw_quoted_second
|
|
944 } state, quoted_state;
|
|
945
|
28
|
946 #if (NGX_SUPPRESS_WARN)
|
0
|
947 decoded = '\0';
|
|
948 quoted_state = sw_usual;
|
28
|
949 #endif
|
0
|
950
|
|
951 state = sw_usual;
|
|
952 p = r->uri_start;
|
|
953 u = r->uri.data;
|
|
954 r->uri_ext = NULL;
|
10
|
955 r->args_start = NULL;
|
0
|
956
|
|
957 ch = *p++;
|
|
958
|
28
|
959 while (p <= r->uri_end) {
|
10
|
960
|
|
961 /*
|
28
|
962 * we use "ch = *p++" inside the cycle, but this operation is safe,
|
10
|
963 * because after the URI there is always at least one charcter:
|
|
964 * the line feed
|
|
965 */
|
0
|
966
|
|
967 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
10
|
968 "s:%d in:'%Xd:%c', out:'%c'", state, ch, ch, *u);
|
0
|
969
|
|
970 switch (state) {
|
122
|
971
|
0
|
972 case sw_usual:
|
254
|
973
|
|
974 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
975 *u++ = ch;
|
|
976 ch = *p++;
|
|
977 break;
|
|
978 }
|
|
979
|
0
|
980 switch(ch) {
|
10
|
981 #if (NGX_WIN32)
|
|
982 case '\\':
|
|
983 r->uri_ext = NULL;
|
|
984
|
|
985 if (p == r->uri_start + r->uri.len) {
|
|
986
|
|
987 /*
|
|
988 * we omit the last "\" to cause redirect because
|
|
989 * the browsers do not treat "\" as "/" in relative URL path
|
|
990 */
|
|
991
|
|
992 break;
|
|
993 }
|
|
994
|
|
995 state = sw_slash;
|
|
996 *u++ = '/';
|
|
997 break;
|
|
998 #endif
|
0
|
999 case '/':
|
|
1000 r->uri_ext = NULL;
|
|
1001 state = sw_slash;
|
|
1002 *u++ = ch;
|
|
1003 break;
|
|
1004 case '%':
|
|
1005 quoted_state = state;
|
|
1006 state = sw_quoted;
|
|
1007 break;
|
10
|
1008 case '?':
|
|
1009 r->args_start = p;
|
254
|
1010 goto args;
|
|
1011 case '#':
|
28
|
1012 goto done;
|
0
|
1013 case '.':
|
|
1014 r->uri_ext = u + 1;
|
22
|
1015 *u++ = ch;
|
|
1016 break;
|
206
|
1017 case '+':
|
|
1018 r->plus_in_uri = 1;
|
0
|
1019 default:
|
|
1020 *u++ = ch;
|
|
1021 break;
|
|
1022 }
|
254
|
1023
|
0
|
1024 ch = *p++;
|
|
1025 break;
|
|
1026
|
|
1027 case sw_slash:
|
254
|
1028
|
|
1029 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
1030 state = sw_usual;
|
|
1031 *u++ = ch;
|
|
1032 ch = *p++;
|
|
1033 break;
|
|
1034 }
|
|
1035
|
0
|
1036 switch(ch) {
|
10
|
1037 #if (NGX_WIN32)
|
|
1038 case '\\':
|
342
|
1039 break;
|
10
|
1040 #endif
|
0
|
1041 case '/':
|
356
|
1042 if (!merge_slashes) {
|
342
|
1043 *u++ = ch;
|
|
1044 }
|
0
|
1045 break;
|
|
1046 case '.':
|
|
1047 state = sw_dot;
|
|
1048 *u++ = ch;
|
|
1049 break;
|
|
1050 case '%':
|
|
1051 quoted_state = state;
|
|
1052 state = sw_quoted;
|
|
1053 break;
|
28
|
1054 case '?':
|
|
1055 r->args_start = p;
|
254
|
1056 goto args;
|
|
1057 case '#':
|
28
|
1058 goto done;
|
206
|
1059 case '+':
|
|
1060 r->plus_in_uri = 1;
|
0
|
1061 default:
|
|
1062 state = sw_usual;
|
|
1063 *u++ = ch;
|
|
1064 break;
|
|
1065 }
|
254
|
1066
|
0
|
1067 ch = *p++;
|
|
1068 break;
|
|
1069
|
|
1070 case sw_dot:
|
254
|
1071
|
|
1072 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
1073 state = sw_usual;
|
|
1074 *u++ = ch;
|
|
1075 ch = *p++;
|
|
1076 break;
|
|
1077 }
|
|
1078
|
0
|
1079 switch(ch) {
|
10
|
1080 #if (NGX_WIN32)
|
|
1081 case '\\':
|
|
1082 #endif
|
0
|
1083 case '/':
|
|
1084 state = sw_slash;
|
|
1085 u--;
|
|
1086 break;
|
|
1087 case '.':
|
|
1088 state = sw_dot_dot;
|
|
1089 *u++ = ch;
|
|
1090 break;
|
|
1091 case '%':
|
|
1092 quoted_state = state;
|
|
1093 state = sw_quoted;
|
|
1094 break;
|
28
|
1095 case '?':
|
|
1096 r->args_start = p;
|
254
|
1097 goto args;
|
|
1098 case '#':
|
28
|
1099 goto done;
|
206
|
1100 case '+':
|
|
1101 r->plus_in_uri = 1;
|
0
|
1102 default:
|
|
1103 state = sw_usual;
|
|
1104 *u++ = ch;
|
|
1105 break;
|
|
1106 }
|
254
|
1107
|
0
|
1108 ch = *p++;
|
|
1109 break;
|
|
1110
|
|
1111 case sw_dot_dot:
|
254
|
1112
|
|
1113 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
1114 state = sw_usual;
|
|
1115 *u++ = ch;
|
|
1116 ch = *p++;
|
|
1117 break;
|
|
1118 }
|
|
1119
|
0
|
1120 switch(ch) {
|
10
|
1121 #if (NGX_WIN32)
|
|
1122 case '\\':
|
|
1123 #endif
|
0
|
1124 case '/':
|
|
1125 state = sw_slash;
|
|
1126 u -= 4;
|
|
1127 if (u < r->uri.data) {
|
|
1128 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
1129 }
|
|
1130 while (*(u - 1) != '/') {
|
|
1131 u--;
|
|
1132 }
|
|
1133 break;
|
|
1134 case '%':
|
|
1135 quoted_state = state;
|
|
1136 state = sw_quoted;
|
|
1137 break;
|
28
|
1138 case '?':
|
|
1139 r->args_start = p;
|
254
|
1140 goto args;
|
|
1141 case '#':
|
28
|
1142 goto done;
|
10
|
1143 #if (NGX_WIN32)
|
0
|
1144 case '.':
|
|
1145 state = sw_dot_dot_dot;
|
|
1146 *u++ = ch;
|
|
1147 break;
|
|
1148 #endif
|
206
|
1149 case '+':
|
|
1150 r->plus_in_uri = 1;
|
0
|
1151 default:
|
|
1152 state = sw_usual;
|
|
1153 *u++ = ch;
|
|
1154 break;
|
|
1155 }
|
254
|
1156
|
0
|
1157 ch = *p++;
|
|
1158 break;
|
|
1159
|
10
|
1160 #if (NGX_WIN32)
|
0
|
1161 case sw_dot_dot_dot:
|
254
|
1162
|
|
1163 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
1164 state = sw_usual;
|
|
1165 *u++ = ch;
|
|
1166 ch = *p++;
|
|
1167 break;
|
|
1168 }
|
|
1169
|
0
|
1170 switch(ch) {
|
10
|
1171 case '\\':
|
0
|
1172 case '/':
|
|
1173 state = sw_slash;
|
|
1174 u -= 5;
|
|
1175 if (u < r->uri.data) {
|
|
1176 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
1177 }
|
|
1178 while (*u != '/') {
|
|
1179 u--;
|
|
1180 }
|
|
1181 if (u < r->uri.data) {
|
|
1182 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
1183 }
|
|
1184 while (*(u - 1) != '/') {
|
|
1185 u--;
|
|
1186 }
|
|
1187 break;
|
|
1188 case '%':
|
|
1189 quoted_state = state;
|
|
1190 state = sw_quoted;
|
|
1191 break;
|
122
|
1192 case '?':
|
|
1193 r->args_start = p;
|
254
|
1194 goto args;
|
|
1195 case '#':
|
122
|
1196 goto done;
|
206
|
1197 case '+':
|
|
1198 r->plus_in_uri = 1;
|
0
|
1199 default:
|
|
1200 state = sw_usual;
|
|
1201 *u++ = ch;
|
|
1202 break;
|
|
1203 }
|
254
|
1204
|
0
|
1205 ch = *p++;
|
|
1206 break;
|
|
1207 #endif
|
|
1208
|
|
1209 case sw_quoted:
|
216
|
1210 r->quoted_uri = 1;
|
|
1211
|
0
|
1212 if (ch >= '0' && ch <= '9') {
|
|
1213 decoded = (u_char) (ch - '0');
|
|
1214 state = sw_quoted_second;
|
|
1215 ch = *p++;
|
|
1216 break;
|
|
1217 }
|
|
1218
|
|
1219 c = (u_char) (ch | 0x20);
|
|
1220 if (c >= 'a' && c <= 'f') {
|
|
1221 decoded = (u_char) (c - 'a' + 10);
|
|
1222 state = sw_quoted_second;
|
|
1223 ch = *p++;
|
|
1224 break;
|
|
1225 }
|
|
1226
|
|
1227 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
1228
|
|
1229 case sw_quoted_second:
|
|
1230 if (ch >= '0' && ch <= '9') {
|
|
1231 ch = (u_char) ((decoded << 4) + ch - '0');
|
38
|
1232
|
0
|
1233 if (ch == '%') {
|
|
1234 state = sw_usual;
|
|
1235 *u++ = ch;
|
|
1236 ch = *p++;
|
|
1237 break;
|
|
1238 }
|
38
|
1239
|
254
|
1240 if (ch == '#') {
|
|
1241 *u++ = ch;
|
|
1242 ch = *p++;
|
|
1243
|
|
1244 } else if (ch == '\0') {
|
38
|
1245 r->zero_in_uri = 1;
|
|
1246 }
|
|
1247
|
0
|
1248 state = quoted_state;
|
|
1249 break;
|
|
1250 }
|
|
1251
|
|
1252 c = (u_char) (ch | 0x20);
|
|
1253 if (c >= 'a' && c <= 'f') {
|
|
1254 ch = (u_char) ((decoded << 4) + c - 'a' + 10);
|
206
|
1255
|
28
|
1256 if (ch == '?') {
|
0
|
1257 *u++ = ch;
|
|
1258 ch = *p++;
|
206
|
1259
|
|
1260 } else if (ch == '+') {
|
|
1261 r->plus_in_uri = 1;
|
0
|
1262 }
|
206
|
1263
|
0
|
1264 state = quoted_state;
|
|
1265 break;
|
|
1266 }
|
|
1267
|
|
1268 return NGX_HTTP_PARSE_INVALID_REQUEST;
|
|
1269 }
|
|
1270 }
|
|
1271
|
28
|
1272 done:
|
|
1273
|
0
|
1274 r->uri.len = u - r->uri.data;
|
254
|
1275
|
|
1276 if (r->uri_ext) {
|
|
1277 r->exten.len = u - r->uri_ext;
|
|
1278 r->exten.data = r->uri_ext;
|
|
1279 }
|
|
1280
|
|
1281 r->uri_ext = NULL;
|
|
1282
|
|
1283 return NGX_OK;
|
|
1284
|
|
1285 args:
|
|
1286
|
|
1287 while (p < r->uri_end) {
|
|
1288 if (*p++ != '#') {
|
|
1289 continue;
|
|
1290 }
|
|
1291
|
|
1292 r->args.len = p - 1 - r->args_start;
|
|
1293 r->args.data = r->args_start;
|
|
1294 r->args_start = NULL;
|
|
1295
|
|
1296 break;
|
|
1297 }
|
|
1298
|
|
1299 r->uri.len = u - r->uri.data;
|
0
|
1300
|
|
1301 if (r->uri_ext) {
|
|
1302 r->exten.len = u - r->uri_ext;
|
10
|
1303 r->exten.data = r->uri_ext;
|
0
|
1304 }
|
|
1305
|
|
1306 r->uri_ext = NULL;
|
|
1307
|
|
1308 return NGX_OK;
|
|
1309 }
|
58
|
1310
|
|
1311
|
|
1312 ngx_int_t
|
122
|
1313 ngx_http_parse_unsafe_uri(ngx_http_request_t *r, ngx_str_t *uri,
|
|
1314 ngx_str_t *args, ngx_uint_t *flags)
|
|
1315 {
|
|
1316 u_char ch, *p;
|
|
1317 size_t len;
|
|
1318
|
|
1319 len = uri->len;
|
|
1320 p = uri->data;
|
|
1321
|
|
1322 if (len == 0 || p[0] == '?') {
|
|
1323 goto unsafe;
|
|
1324 }
|
|
1325
|
|
1326 if (p[0] == '.' && len == 3 && p[1] == '.' && (p[2] == '/'
|
|
1327 #if (NGX_WIN32)
|
|
1328 || p[2] == '\\'
|
|
1329 #endif
|
|
1330 ))
|
|
1331 {
|
|
1332 goto unsafe;
|
|
1333 }
|
|
1334
|
|
1335 for ( /* void */ ; len; len--) {
|
|
1336
|
|
1337 ch = *p++;
|
|
1338
|
254
|
1339 if (usual[ch >> 5] & (1 << (ch & 0x1f))) {
|
|
1340 continue;
|
|
1341 }
|
|
1342
|
122
|
1343 if (ch == '?') {
|
|
1344 args->len = len - 1;
|
|
1345 args->data = p;
|
|
1346 uri->len -= len;
|
|
1347
|
|
1348 return NGX_OK;
|
|
1349 }
|
|
1350
|
|
1351 if (ch == '\0') {
|
|
1352 *flags |= NGX_HTTP_ZERO_IN_URI;
|
|
1353 continue;
|
|
1354 }
|
|
1355
|
254
|
1356 if ((ch == '/'
|
122
|
1357 #if (NGX_WIN32)
|
254
|
1358 || ch == '\\'
|
122
|
1359 #endif
|
254
|
1360 ) && len > 2)
|
122
|
1361 {
|
|
1362 /* detect "/../" */
|
|
1363
|
124
|
1364 if (p[0] == '.' && p[1] == '.' && p[2] == '/') {
|
122
|
1365 goto unsafe;
|
|
1366 }
|
|
1367
|
|
1368 #if (NGX_WIN32)
|
|
1369
|
|
1370 if (p[2] == '\\') {
|
|
1371 goto unsafe;
|
|
1372 }
|
|
1373
|
|
1374 if (len > 3) {
|
|
1375
|
|
1376 /* detect "/.../" */
|
|
1377
|
124
|
1378 if (p[0] == '.' && p[1] == '.' && p[2] == '.'
|
|
1379 && (p[3] == '/' || p[3] == '\\'))
|
|
1380 {
|
122
|
1381 goto unsafe;
|
|
1382 }
|
|
1383 }
|
|
1384 #endif
|
|
1385 }
|
|
1386 }
|
|
1387
|
|
1388 return NGX_OK;
|
|
1389
|
|
1390 unsafe:
|
|
1391
|
|
1392 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
1393 "unsafe URI \"%V\" was detected", uri);
|
|
1394
|
|
1395 return NGX_ERROR;
|
|
1396 }
|
|
1397
|
|
1398
|
|
1399 ngx_int_t
|
58
|
1400 ngx_http_parse_multi_header_lines(ngx_array_t *headers, ngx_str_t *name,
|
|
1401 ngx_str_t *value)
|
|
1402 {
|
|
1403 ngx_uint_t i;
|
|
1404 u_char *start, *last, *end, ch;
|
|
1405 ngx_table_elt_t **h;
|
|
1406
|
|
1407 h = headers->elts;
|
|
1408
|
|
1409 for (i = 0; i < headers->nelts; i++) {
|
|
1410
|
|
1411 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, headers->pool->log, 0,
|
|
1412 "parse header: \"%V: %V\"", &h[i]->key, &h[i]->value);
|
|
1413
|
|
1414 if (name->len > h[i]->value.len) {
|
|
1415 continue;
|
|
1416 }
|
126
|
1417
|
58
|
1418 start = h[i]->value.data;
|
|
1419 end = h[i]->value.data + h[i]->value.len;
|
|
1420
|
|
1421 while (start < end) {
|
|
1422
|
|
1423 if (ngx_strncasecmp(start, name->data, name->len) != 0) {
|
|
1424 goto skip;
|
|
1425 }
|
|
1426
|
|
1427 for (start += name->len; start < end && *start == ' '; start++) {
|
|
1428 /* void */
|
|
1429 }
|
|
1430
|
|
1431 if (value == NULL) {
|
|
1432 if (start == end || *start == ',') {
|
|
1433 return i;
|
|
1434 }
|
|
1435
|
|
1436 goto skip;
|
|
1437 }
|
|
1438
|
|
1439 if (start == end || *start++ != '=') {
|
|
1440 /* the invalid header value */
|
|
1441 goto skip;
|
|
1442 }
|
|
1443
|
|
1444 while (start < end && *start == ' ') { start++; }
|
|
1445
|
|
1446 for (last = start; last < end && *last != ';'; last++) {
|
|
1447 /* void */
|
|
1448 }
|
|
1449
|
|
1450 value->len = last - start;
|
|
1451 value->data = start;
|
|
1452
|
|
1453 return i;
|
|
1454
|
|
1455 skip:
|
122
|
1456
|
58
|
1457 while (start < end) {
|
|
1458 ch = *start++;
|
|
1459 if (ch == ';' || ch == ',') {
|
|
1460 break;
|
|
1461 }
|
|
1462 }
|
|
1463
|
|
1464 while (start < end && *start == ' ') { start++; }
|
|
1465 }
|
|
1466 }
|
|
1467
|
|
1468 return NGX_DECLINED;
|
|
1469 }
|