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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_event.h>
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10 #include <ngx_http.h>
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11
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12
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58
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13 static void ngx_http_read_client_request_body_handler(ngx_http_request_t *r);
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14 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r);
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182
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15 static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r,
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16 ngx_chain_t *body);
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326
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17 static void ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r);
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18 static ngx_int_t ngx_http_read_discarded_request_body(ngx_http_request_t *r);
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382
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19 static ngx_int_t ngx_http_test_expect(ngx_http_request_t *r);
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182
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20
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0
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21
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28
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22 /*
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23 * on completion ngx_http_read_client_request_body() adds to
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24 * r->request_body->bufs one or two bufs:
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25 * *) one memory buf that was preread in r->header_in;
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26 * *) one memory or file buf that contains the rest of the body
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27 */
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0
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28
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50
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29 ngx_int_t
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30 ngx_http_read_client_request_body(ngx_http_request_t *r,
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31 ngx_http_client_body_handler_pt post_handler)
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0
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32 {
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212
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33 size_t preread;
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34 ssize_t size;
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0
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35 ngx_buf_t *b;
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182
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36 ngx_chain_t *cl, **next;
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238
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37 ngx_temp_file_t *tf;
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28
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38 ngx_http_request_body_t *rb;
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0
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39 ngx_http_core_loc_conf_t *clcf;
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40
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86
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41 if (r->request_body || r->discard_body) {
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58
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42 post_handler(r);
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43 return NGX_OK;
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44 }
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45
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382
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46 if (ngx_http_test_expect(r) != NGX_OK) {
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47 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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48 }
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49
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50
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50 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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51 if (rb == NULL) {
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28
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52 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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53 }
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54
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55 r->request_body = rb;
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56
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238
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57 if (r->headers_in.content_length_n < 0) {
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58 post_handler(r);
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59 return NGX_OK;
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60 }
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61
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62 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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63
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64 if (r->headers_in.content_length_n == 0) {
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65
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66 if (r->request_body_in_file_only) {
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67 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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68 if (tf == NULL) {
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69 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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70 }
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71
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72 tf->file.fd = NGX_INVALID_FILE;
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73 tf->file.log = r->connection->log;
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74 tf->path = clcf->client_body_temp_path;
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75 tf->pool = r->pool;
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76 tf->warn = "a client request body is buffered to a temporary file";
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77 tf->log_level = r->request_body_file_log_level;
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78 tf->persistent = r->request_body_in_persistent_file;
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278
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79 tf->clean = r->request_body_in_clean_file;
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238
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80
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81 if (r->request_body_file_group_access) {
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276
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82 tf->access = 0660;
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238
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83 }
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84
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85 rb->temp_file = tf;
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86
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87 if (ngx_create_temp_file(&tf->file, tf->path, tf->pool,
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278
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88 tf->persistent, tf->clean, tf->access)
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238
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89 != NGX_OK)
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90 {
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91 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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92 }
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93 }
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94
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28
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95 post_handler(r);
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318
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96
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28
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97 return NGX_OK;
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98 }
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99
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100 rb->post_handler = post_handler;
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101
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102 /*
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103 * set by ngx_pcalloc():
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104 *
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105 * rb->bufs = NULL;
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106 * rb->buf = NULL;
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107 * rb->rest = 0;
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108 */
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109
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182
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110 preread = r->header_in->last - r->header_in->pos;
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0
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111
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182
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112 if (preread) {
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0
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113
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114 /* there is the pre-read part of the request body */
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115
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182
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116 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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117 "http client request body preread %uz", preread);
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118
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50
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119 b = ngx_calloc_buf(r->pool);
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120 if (b == NULL) {
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28
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121 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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122 }
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0
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123
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124 b->temporary = 1;
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182
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125 b->start = r->header_in->pos;
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126 b->pos = r->header_in->pos;
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127 b->last = r->header_in->last;
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128 b->end = r->header_in->end;
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0
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129
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50
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130 rb->bufs = ngx_alloc_chain_link(r->pool);
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131 if (rb->bufs == NULL) {
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28
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132 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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133 }
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134
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135 rb->bufs->buf = b;
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136 rb->bufs->next = NULL;
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0
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137
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216
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138 rb->buf = b;
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139
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214
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140 if ((off_t) preread >= r->headers_in.content_length_n) {
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0
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141
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142 /* the whole request body was pre-read */
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143
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212
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144 r->header_in->pos += (size_t) r->headers_in.content_length_n;
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24
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145 r->request_length += r->headers_in.content_length_n;
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0
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146
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182
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147 if (r->request_body_in_file_only) {
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148 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
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149 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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150 }
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151 }
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152
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28
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153 post_handler(r);
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0
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154
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155 return NGX_OK;
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156 }
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157
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182
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158 /*
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159 * to not consider the body as pipelined request in
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160 * ngx_http_set_keepalive()
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161 */
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0
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162 r->header_in->pos = r->header_in->last;
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182
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163
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164 r->request_length += preread;
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165
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166 rb->rest = r->headers_in.content_length_n - preread;
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167
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214
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168 if (rb->rest <= (off_t) (b->end - b->last)) {
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182
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169
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170 /* the whole request body may be placed in r->header_in */
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171
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276
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172 rb->to_write = rb->bufs;
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173
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182
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174 r->read_event_handler = ngx_http_read_client_request_body_handler;
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175
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176 return ngx_http_do_read_client_request_body(r);
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177 }
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178
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179 next = &rb->bufs->next;
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180
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181 } else {
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182 b = NULL;
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183 rb->rest = r->headers_in.content_length_n;
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184 next = &rb->bufs;
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0
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185 }
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186
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182
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187 size = clcf->client_body_buffer_size;
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188 size += size >> 2;
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0
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189
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212
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190 if (rb->rest < size) {
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191 size = (ssize_t) rb->rest;
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0
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192
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182
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193 if (r->request_body_in_single_buf) {
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194 size += preread;
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195 }
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196
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0
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197 } else {
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198 size = clcf->client_body_buffer_size;
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182
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199
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200 /* disable copying buffer for r->request_body_in_single_buf */
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201 b = NULL;
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0
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202 }
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203
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50
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204 rb->buf = ngx_create_temp_buf(r->pool, size);
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205 if (rb->buf == NULL) {
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28
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206 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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207 }
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0
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208
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50
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209 cl = ngx_alloc_chain_link(r->pool);
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210 if (cl == NULL) {
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28
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211 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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212 }
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0
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213
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28
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214 cl->buf = rb->buf;
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215 cl->next = NULL;
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216
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182
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217 if (b && r->request_body_in_single_buf) {
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218 size = b->last - b->pos;
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219 ngx_memcpy(rb->buf->pos, b->pos, size);
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220 rb->buf->last += size;
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221
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222 next = &rb->bufs;
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223 }
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224
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225 *next = cl;
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226
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227 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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228 rb->to_write = rb->bufs;
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0
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229
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230 } else {
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182
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231 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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232 }
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233
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58
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234 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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235
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58
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236 return ngx_http_do_read_client_request_body(r);
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0
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237 }
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238
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239
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50
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240 static void
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58
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241 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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242 {
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58
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243 ngx_int_t rc;
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0
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244
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58
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245 if (r->connection->read->timedout) {
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126
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246 r->connection->timedout = 1;
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278
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247 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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248 return;
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249 }
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250
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58
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251 rc = ngx_http_do_read_client_request_body(r);
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0
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252
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253 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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278
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254 ngx_http_finalize_request(r, rc);
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0
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255 }
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256 }
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257
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258
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50
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259 static ngx_int_t
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58
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260 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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261 {
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262 size_t size;
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263 ssize_t n;
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264 ngx_buf_t *b;
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58
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265 ngx_connection_t *c;
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28
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266 ngx_http_request_body_t *rb;
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0
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267 ngx_http_core_loc_conf_t *clcf;
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268
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58
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269 c = r->connection;
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28
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270 rb = r->request_body;
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0
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271
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272 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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273 "http read client request body");
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274
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275 for ( ;; ) {
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256
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276 for ( ;; ) {
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277 if (rb->buf->last == rb->buf->end) {
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278
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279 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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280 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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281 }
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28
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282
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256
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283 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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284 rb->buf->last = rb->buf->start;
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285 }
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286
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287 size = rb->buf->end - rb->buf->last;
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288
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289 if ((off_t) size > rb->rest) {
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290 size = (size_t) rb->rest;
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0
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291 }
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292
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256
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293 n = c->recv(c, rb->buf->last, size);
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294
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295 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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296 "http client request body recv %z", n);
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0
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297
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256
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298 if (n == NGX_AGAIN) {
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299 break;
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300 }
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301
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302 if (n == 0) {
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303 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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304 "client closed prematurely connection");
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305 }
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0
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306
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256
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307 if (n == 0 || n == NGX_ERROR) {
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308 c->error = 1;
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309 return NGX_HTTP_BAD_REQUEST;
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310 }
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311
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312 rb->buf->last += n;
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313 rb->rest -= n;
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314 r->request_length += n;
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315
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316 if (rb->rest == 0) {
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317 break;
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318 }
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319
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320 if (rb->buf->last < rb->buf->end) {
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321 break;
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322 }
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0
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323 }
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324
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325 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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286
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326 "http client request body rest %O", rb->rest);
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0
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327
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28
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328 if (rb->rest == 0) {
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0
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329 break;
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330 }
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331
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256
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332 if (!c->read->ready) {
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333 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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334 ngx_add_timer(c->read, clcf->client_body_timeout);
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0
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335
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256
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336 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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337 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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338 }
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122
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339
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256
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340 return NGX_AGAIN;
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122
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341 }
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0
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342 }
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343
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122
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344 if (c->read->timer_set) {
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345 ngx_del_timer(c->read);
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346 }
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347
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182
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348 if (rb->temp_file || r->request_body_in_file_only) {
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0
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349
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350 /* save the last part */
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28
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351
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182
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352 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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353 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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354 }
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355
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50
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356 b = ngx_calloc_buf(r->pool);
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357 if (b == NULL) {
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0
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358 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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359 }
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360
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361 b->in_file = 1;
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362 b->file_pos = 0;
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28
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363 b->file_last = rb->temp_file->file.offset;
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364 b->file = &rb->temp_file->file;
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0
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365
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28
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366 if (rb->bufs->next) {
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367 rb->bufs->next->buf = b;
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0
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368
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369 } else {
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28
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370 rb->bufs->buf = b;
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0
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371 }
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372 }
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373
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182
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374 if (r->request_body_in_file_only && rb->bufs->next) {
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375 rb->bufs = rb->bufs->next;
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376 }
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377
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28
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378 rb->post_handler(r);
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0
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379
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380 return NGX_OK;
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381 }
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182
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382
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|
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383
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|
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384 static ngx_int_t
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385 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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386 {
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387 ssize_t n;
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388 ngx_temp_file_t *tf;
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389 ngx_http_request_body_t *rb;
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390 ngx_http_core_loc_conf_t *clcf;
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391
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392 rb = r->request_body;
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393
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|
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394 if (rb->temp_file == NULL) {
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|
|
395 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
|
|
|
396 if (tf == NULL) {
|
|
|
397 return NGX_ERROR;
|
|
|
398 }
|
|
|
399
|
|
|
400 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
401
|
|
|
402 tf->file.fd = NGX_INVALID_FILE;
|
|
|
403 tf->file.log = r->connection->log;
|
|
|
404 tf->path = clcf->client_body_temp_path;
|
|
|
405 tf->pool = r->pool;
|
|
|
406 tf->warn = "a client request body is buffered to a temporary file";
|
|
186
|
407 tf->log_level = r->request_body_file_log_level;
|
|
182
|
408 tf->persistent = r->request_body_in_persistent_file;
|
|
278
|
409 tf->clean = r->request_body_in_clean_file;
|
|
182
|
410
|
|
|
411 if (r->request_body_file_group_access) {
|
|
276
|
412 tf->access = 0660;
|
|
182
|
413 }
|
|
|
414
|
|
|
415 rb->temp_file = tf;
|
|
|
416 }
|
|
|
417
|
|
|
418 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
|
|
|
419
|
|
|
420 /* TODO: n == 0 or not complete and level event */
|
|
|
421
|
|
|
422 if (n == NGX_ERROR) {
|
|
|
423 return NGX_ERROR;
|
|
|
424 }
|
|
|
425
|
|
|
426 rb->temp_file->offset += n;
|
|
|
427
|
|
|
428 return NGX_OK;
|
|
|
429 }
|
|
|
430
|
|
|
431
|
|
|
432 ngx_int_t
|
|
326
|
433 ngx_http_discard_request_body(ngx_http_request_t *r)
|
|
182
|
434 {
|
|
|
435 ssize_t size;
|
|
|
436 ngx_event_t *rev;
|
|
|
437
|
|
222
|
438 if (r != r->main || r->discard_body) {
|
|
182
|
439 return NGX_OK;
|
|
|
440 }
|
|
|
441
|
|
382
|
442 if (ngx_http_test_expect(r) != NGX_OK) {
|
|
|
443 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
444 }
|
|
|
445
|
|
182
|
446 rev = r->connection->read;
|
|
|
447
|
|
|
448 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
|
|
|
449
|
|
|
450 if (rev->timer_set) {
|
|
|
451 ngx_del_timer(rev);
|
|
|
452 }
|
|
|
453
|
|
342
|
454 if (r->headers_in.content_length_n <= 0 || r->request_body) {
|
|
182
|
455 return NGX_OK;
|
|
|
456 }
|
|
|
457
|
|
|
458 size = r->header_in->last - r->header_in->pos;
|
|
|
459
|
|
|
460 if (size) {
|
|
|
461 if (r->headers_in.content_length_n > size) {
|
|
|
462 r->headers_in.content_length_n -= size;
|
|
|
463
|
|
|
464 } else {
|
|
212
|
465 r->header_in->pos += (size_t) r->headers_in.content_length_n;
|
|
182
|
466 r->headers_in.content_length_n = 0;
|
|
|
467 return NGX_OK;
|
|
|
468 }
|
|
|
469 }
|
|
|
470
|
|
332
|
471 r->discard_body = 1;
|
|
|
472
|
|
326
|
473 r->read_event_handler = ngx_http_read_discarded_request_body_handler;
|
|
182
|
474
|
|
|
475 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
476 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
477 }
|
|
|
478
|
|
326
|
479 (void) ngx_http_read_discarded_request_body(r);
|
|
|
480
|
|
|
481 return NGX_OK;
|
|
182
|
482 }
|
|
|
483
|
|
|
484
|
|
|
485 static void
|
|
326
|
486 ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r)
|
|
182
|
487 {
|
|
326
|
488 ngx_int_t rc;
|
|
|
489 ngx_msec_t timer;
|
|
|
490 ngx_event_t *rev;
|
|
|
491 ngx_connection_t *c;
|
|
|
492 ngx_http_core_loc_conf_t *clcf;
|
|
|
493
|
|
|
494 c = r->connection;
|
|
|
495 rev = c->read;
|
|
182
|
496
|
|
326
|
497 if (rev->timedout) {
|
|
|
498 c->timedout = 1;
|
|
|
499 c->error = 1;
|
|
|
500 ngx_http_finalize_request(r, 0);
|
|
|
501 return;
|
|
|
502 }
|
|
182
|
503
|
|
326
|
504 if (r->lingering_time) {
|
|
346
|
505 timer = (ngx_msec_t) (r->lingering_time - ngx_time());
|
|
326
|
506
|
|
|
507 if (timer <= 0) {
|
|
|
508 r->discard_body = 0;
|
|
|
509 ngx_http_finalize_request(r, 0);
|
|
182
|
510 return;
|
|
|
511 }
|
|
326
|
512
|
|
|
513 } else {
|
|
|
514 timer = 0;
|
|
|
515 }
|
|
|
516
|
|
|
517 rc = ngx_http_read_discarded_request_body(r);
|
|
|
518
|
|
|
519 if (rc == NGX_OK) {
|
|
|
520
|
|
|
521 r->discard_body = 0;
|
|
|
522
|
|
|
523 if (r->done) {
|
|
|
524 ngx_http_finalize_request(r, 0);
|
|
|
525 }
|
|
|
526
|
|
|
527 return;
|
|
182
|
528 }
|
|
|
529
|
|
326
|
530 /* rc == NGX_AGAIN */
|
|
|
531
|
|
|
532 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
332
|
533 c->error = 1;
|
|
182
|
534 ngx_http_finalize_request(r, rc);
|
|
326
|
535 return;
|
|
|
536 }
|
|
|
537
|
|
|
538 if (timer) {
|
|
|
539
|
|
|
540 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
541
|
|
|
542 timer *= 1000;
|
|
|
543
|
|
|
544 if (timer > clcf->lingering_timeout) {
|
|
|
545 timer = clcf->lingering_timeout;
|
|
|
546 }
|
|
|
547
|
|
|
548 ngx_add_timer(rev, timer);
|
|
182
|
549 }
|
|
|
550 }
|
|
|
551
|
|
|
552
|
|
|
553 static ngx_int_t
|
|
326
|
554 ngx_http_read_discarded_request_body(ngx_http_request_t *r)
|
|
182
|
555 {
|
|
212
|
556 size_t size;
|
|
|
557 ssize_t n;
|
|
182
|
558 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
559
|
|
|
560 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
561 "http read discarded body");
|
|
|
562
|
|
326
|
563 do {
|
|
|
564 if (r->headers_in.content_length_n == 0) {
|
|
|
565 r->read_event_handler = ngx_http_block_reading;
|
|
|
566 return NGX_OK;
|
|
|
567 }
|
|
182
|
568
|
|
326
|
569 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ?
|
|
|
570 NGX_HTTP_DISCARD_BUFFER_SIZE:
|
|
|
571 (size_t) r->headers_in.content_length_n;
|
|
182
|
572
|
|
326
|
573 n = r->connection->recv(r->connection, buffer, size);
|
|
182
|
574
|
|
326
|
575 if (n == NGX_ERROR) {
|
|
|
576 r->connection->error = 1;
|
|
|
577 return NGX_OK;
|
|
|
578 }
|
|
182
|
579
|
|
326
|
580 if (n == NGX_AGAIN) {
|
|
|
581 return NGX_AGAIN;
|
|
|
582 }
|
|
182
|
583
|
|
330
|
584 if (n == 0) {
|
|
|
585 return NGX_OK;
|
|
|
586 }
|
|
|
587
|
|
326
|
588 r->headers_in.content_length_n -= n;
|
|
182
|
589
|
|
326
|
590 } while (r->connection->read->ready);
|
|
|
591
|
|
|
592 return NGX_AGAIN;
|
|
182
|
593 }
|
|
382
|
594
|
|
|
595
|
|
|
596 static ngx_int_t
|
|
|
597 ngx_http_test_expect(ngx_http_request_t *r)
|
|
|
598 {
|
|
|
599 ngx_int_t n;
|
|
|
600 ngx_str_t *expect;
|
|
|
601
|
|
|
602 if (r->expect_tested
|
|
|
603 || r->headers_in.expect == NULL
|
|
|
604 || r->http_version < NGX_HTTP_VERSION_11)
|
|
|
605 {
|
|
|
606 return NGX_OK;
|
|
|
607 }
|
|
|
608
|
|
|
609 r->expect_tested = 1;
|
|
|
610
|
|
|
611 expect = &r->headers_in.expect->value;
|
|
|
612
|
|
|
613 if (expect->len != sizeof("100-continue") - 1
|
|
|
614 || ngx_strncasecmp(expect->data, (u_char *) "100-continue",
|
|
|
615 sizeof("100-continue") - 1)
|
|
|
616 != 0)
|
|
|
617 {
|
|
|
618 return NGX_OK;
|
|
|
619 }
|
|
|
620
|
|
|
621 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
622 "send 100 Continue");
|
|
|
623
|
|
|
624 n = r->connection->send(r->connection,
|
|
|
625 (u_char *) "HTTP/1.1 100 Continue" CRLF CRLF,
|
|
|
626 sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1);
|
|
|
627
|
|
|
628 if (n == sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1) {
|
|
|
629 return NGX_OK;
|
|
|
630 }
|
|
|
631
|
|
|
632 /* we assume that such small packet should be send successfully */
|
|
|
633
|
|
|
634 return NGX_ERROR;
|
|
|
635 }
|
