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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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17 static void ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc);
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18 static void ngx_http_read_discarded_body_handler(ngx_http_request_t *r);
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19 static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r);
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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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182
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33 ssize_t size, preread;
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0
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34 ngx_buf_t *b;
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182
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35 ngx_chain_t *cl, **next;
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28
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36 ngx_http_request_body_t *rb;
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0
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37 ngx_http_core_loc_conf_t *clcf;
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38
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86
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39 if (r->request_body || r->discard_body) {
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58
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40 post_handler(r);
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41 return NGX_OK;
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42 }
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43
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50
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44 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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45 if (rb == NULL) {
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28
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46 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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47 }
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48
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49 r->request_body = rb;
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50
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51 if (r->headers_in.content_length_n <= 0) {
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52 post_handler(r);
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53 return NGX_OK;
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54 }
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55
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56 rb->post_handler = post_handler;
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57
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58 /*
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59 * set by ngx_pcalloc():
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60 *
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61 * rb->bufs = NULL;
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62 * rb->buf = NULL;
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63 * rb->rest = 0;
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64 */
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65
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182
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66 preread = r->header_in->last - r->header_in->pos;
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0
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67
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182
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68 if (preread) {
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0
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69
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70 /* there is the pre-read part of the request body */
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71
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182
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72 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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73 "http client request body preread %uz", preread);
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74
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50
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75 b = ngx_calloc_buf(r->pool);
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76 if (b == NULL) {
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28
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77 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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78 }
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0
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79
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80 b->temporary = 1;
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182
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81 b->start = r->header_in->pos;
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82 b->pos = r->header_in->pos;
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83 b->last = r->header_in->last;
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84 b->end = r->header_in->end;
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0
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85
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50
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86 rb->bufs = ngx_alloc_chain_link(r->pool);
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87 if (rb->bufs == NULL) {
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28
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88 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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89 }
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90
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91 rb->bufs->buf = b;
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92 rb->bufs->next = NULL;
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0
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93
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182
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94 if (preread >= r->headers_in.content_length_n) {
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0
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95
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96 /* the whole request body was pre-read */
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97
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98 r->header_in->pos += r->headers_in.content_length_n;
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24
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99 r->request_length += r->headers_in.content_length_n;
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0
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100
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182
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101 if (r->request_body_in_file_only) {
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102 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
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103 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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104 }
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105 }
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106
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28
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107 post_handler(r);
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0
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108
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109 return NGX_OK;
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110 }
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111
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182
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112 /*
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113 * to not consider the body as pipelined request in
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114 * ngx_http_set_keepalive()
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115 */
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0
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116 r->header_in->pos = r->header_in->last;
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182
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117
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118 r->request_length += preread;
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119
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120 rb->rest = r->headers_in.content_length_n - preread;
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121
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122 if (rb->rest <= (size_t) (b->end - b->last)) {
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123
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124 /* the whole request body may be placed in r->header_in */
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125
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126 rb->buf = b;
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127
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128 r->read_event_handler = ngx_http_read_client_request_body_handler;
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129
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130 return ngx_http_do_read_client_request_body(r);
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131 }
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132
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133 next = &rb->bufs->next;
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134
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135 } else {
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136 b = NULL;
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137 rb->rest = r->headers_in.content_length_n;
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138 next = &rb->bufs;
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0
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139 }
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140
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141 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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142
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182
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143 size = clcf->client_body_buffer_size;
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144 size += size >> 2;
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0
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145
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182
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146 if (rb->rest < (size_t) size) {
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28
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147 size = rb->rest;
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0
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148
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182
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149 if (r->request_body_in_single_buf) {
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150 size += preread;
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151 }
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152
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0
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153 } else {
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154 size = clcf->client_body_buffer_size;
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182
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155
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156 /* disable copying buffer for r->request_body_in_single_buf */
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157 b = NULL;
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0
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158 }
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159
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50
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160 rb->buf = ngx_create_temp_buf(r->pool, size);
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161 if (rb->buf == NULL) {
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28
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162 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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163 }
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0
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164
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50
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165 cl = ngx_alloc_chain_link(r->pool);
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166 if (cl == NULL) {
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28
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167 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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168 }
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0
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169
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28
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170 cl->buf = rb->buf;
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171 cl->next = NULL;
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172
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182
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173 if (b && r->request_body_in_single_buf) {
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174 size = b->last - b->pos;
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175 ngx_memcpy(rb->buf->pos, b->pos, size);
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176 rb->buf->last += size;
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177
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178 next = &rb->bufs;
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179 }
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180
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181 *next = cl;
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182
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183 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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184 rb->to_write = rb->bufs;
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0
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185
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186 } else {
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182
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187 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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188 }
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189
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58
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190 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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191
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58
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192 return ngx_http_do_read_client_request_body(r);
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0
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193 }
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194
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195
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50
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196 static void
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58
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197 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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198 {
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58
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199 ngx_int_t rc;
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0
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200
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58
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201 if (r->connection->read->timedout) {
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126
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202 r->connection->timedout = 1;
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182
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203 ngx_http_finalize_request_body(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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204 return;
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205 }
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206
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58
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207 rc = ngx_http_do_read_client_request_body(r);
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0
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208
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209 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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182
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210 ngx_http_finalize_request_body(r, rc);
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0
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211 }
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212 }
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213
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214
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50
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215 static ngx_int_t
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58
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216 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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217 {
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218 size_t size;
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219 ssize_t n;
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220 ngx_buf_t *b;
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58
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221 ngx_connection_t *c;
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28
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222 ngx_http_request_body_t *rb;
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0
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223 ngx_http_core_loc_conf_t *clcf;
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224
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58
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225 c = r->connection;
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28
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226 rb = r->request_body;
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0
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227
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228 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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229 "http read client request body");
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230
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231 for ( ;; ) {
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28
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232 if (rb->buf->last == rb->buf->end) {
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233
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182
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234 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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235 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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236 }
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237
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182
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238 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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28
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239 rb->buf->last = rb->buf->start;
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0
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240 }
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241
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28
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242 size = rb->buf->end - rb->buf->last;
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0
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243
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28
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244 if (size > rb->rest) {
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245 size = rb->rest;
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0
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246 }
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247
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28
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248 n = c->recv(c, rb->buf->last, size);
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0
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249
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250 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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10
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251 "http client request body recv %z", n);
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0
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252
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253 if (n == NGX_AGAIN) {
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122
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254 break;
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0
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255 }
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256
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257 if (n == 0) {
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258 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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259 "client closed prematurely connection");
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260 }
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261
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262 if (n == 0 || n == NGX_ERROR) {
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132
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263 c->error = 1;
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0
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264 return NGX_HTTP_BAD_REQUEST;
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265 }
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266
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28
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267 rb->buf->last += n;
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268 rb->rest -= n;
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24
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269 r->request_length += n;
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0
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270
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28
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271 if (rb->rest == 0) {
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0
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272 break;
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273 }
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274
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28
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275 if (rb->buf->last < rb->buf->end) {
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0
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276 break;
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277 }
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278 }
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279
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280 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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28
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281 "http client request body rest %uz", rb->rest);
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0
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282
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28
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283 if (rb->rest) {
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122
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284 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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285 ngx_add_timer(c->read, clcf->client_body_timeout);
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286
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287 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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288 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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289 }
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290
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0
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291 return NGX_AGAIN;
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292 }
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293
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122
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294 if (c->read->timer_set) {
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295 ngx_del_timer(c->read);
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296 }
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297
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182
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298 if (rb->temp_file || r->request_body_in_file_only) {
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0
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299
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300 /* save the last part */
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28
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301
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182
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302 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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303 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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304 }
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305
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50
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306 b = ngx_calloc_buf(r->pool);
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307 if (b == NULL) {
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0
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308 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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309 }
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310
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311 b->in_file = 1;
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312 b->file_pos = 0;
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28
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313 b->file_last = rb->temp_file->file.offset;
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314 b->file = &rb->temp_file->file;
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0
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315
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28
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316 if (rb->bufs->next) {
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317 rb->bufs->next->buf = b;
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0
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318
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319 } else {
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28
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320 rb->bufs->buf = b;
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0
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321 }
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322 }
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323
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182
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324 if (r->request_body_in_file_only && rb->bufs->next) {
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325 rb->bufs = rb->bufs->next;
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326 }
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327
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28
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328 rb->post_handler(r);
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0
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329
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330 return NGX_OK;
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331 }
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182
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332
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333
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334 static ngx_int_t
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335 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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336 {
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337 ssize_t n;
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338 ngx_temp_file_t *tf;
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339 ngx_http_request_body_t *rb;
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340 ngx_http_core_loc_conf_t *clcf;
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341
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342 rb = r->request_body;
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343
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344 if (rb->temp_file == NULL) {
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345 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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346 if (tf == NULL) {
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347 return NGX_ERROR;
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348 }
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349
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350 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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351
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352 tf->file.fd = NGX_INVALID_FILE;
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353 tf->file.log = r->connection->log;
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354 tf->path = clcf->client_body_temp_path;
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355 tf->pool = r->pool;
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356 tf->warn = "a client request body is buffered to a temporary file";
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357 tf->persistent = r->request_body_in_persistent_file;
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358
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359 if (r->request_body_file_group_access) {
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360 tf->mode = 0660;
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361 }
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362
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363 rb->temp_file = tf;
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364 }
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365
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366 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
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367
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368 /* TODO: n == 0 or not complete and level event */
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369
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370 if (n == NGX_ERROR) {
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371 return NGX_ERROR;
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372 }
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373
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374 rb->temp_file->offset += n;
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375
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376 return NGX_OK;
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377 }
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378
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379
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380 static void
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381 ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc)
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382 {
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383 if (r->request_body->temp_file
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384 && r->request_body_in_persistent_file
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385 && r->request_body_delete_incomplete_file)
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386 {
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387 if (ngx_delete_file(r->request_body->temp_file->file.name.data)
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388 == NGX_FILE_ERROR)
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389 {
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390 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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391 ngx_delete_file_n " \"%s\" failed",
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392 r->request_body->temp_file->file.name.data);
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393 }
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394 }
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395
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396 ngx_http_finalize_request(r, rc);
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397 }
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398
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399
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400 ngx_int_t
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401 ngx_http_discard_body(ngx_http_request_t *r)
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402 {
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403 ssize_t size;
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404 ngx_event_t *rev;
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405
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406 if (r != r->main) {
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407 return NGX_OK;
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408 }
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409
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410 rev = r->connection->read;
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411
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412 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
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413
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414 if (rev->timer_set) {
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415 ngx_del_timer(rev);
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416 }
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417
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418 if (r->headers_in.content_length_n <= 0) {
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419 return NGX_OK;
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420 }
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421
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422 r->discard_body = 1;
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423
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424 size = r->header_in->last - r->header_in->pos;
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425
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426 if (size) {
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427 if (r->headers_in.content_length_n > size) {
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428 r->headers_in.content_length_n -= size;
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429
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430 } else {
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431 r->header_in->pos += r->headers_in.content_length_n;
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432 r->headers_in.content_length_n = 0;
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433 return NGX_OK;
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434 }
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|
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435 }
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436
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|
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437 r->read_event_handler = ngx_http_read_discarded_body_handler;
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438
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439 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
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440 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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|
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441 }
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442
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|
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443 return ngx_http_read_discarded_body(r);
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|
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444 }
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445
|
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446
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|
|
447 static void
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|
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448 ngx_http_read_discarded_body_handler(ngx_http_request_t *r)
|
|
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449 {
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|
|
450 ngx_int_t rc;
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|
451
|
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452 rc = ngx_http_read_discarded_body(r);
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453
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|
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454 if (rc == NGX_AGAIN) {
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455 if (ngx_handle_read_event(r->connection->read, 0) == NGX_ERROR) {
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|
|
456 ngx_http_finalize_request(r, rc);
|
|
|
457 return;
|
|
|
458 }
|
|
|
459 }
|
|
|
460
|
|
|
461 if (rc != NGX_OK) {
|
|
|
462 ngx_http_finalize_request(r, rc);
|
|
|
463 }
|
|
|
464 }
|
|
|
465
|
|
|
466
|
|
|
467 static ngx_int_t
|
|
|
468 ngx_http_read_discarded_body(ngx_http_request_t *r)
|
|
|
469 {
|
|
|
470 ssize_t size, n;
|
|
|
471 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
472
|
|
|
473 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
474 "http read discarded body");
|
|
|
475
|
|
|
476 if (r->headers_in.content_length_n == 0) {
|
|
|
477 return NGX_OK;
|
|
|
478 }
|
|
|
479
|
|
|
480
|
|
|
481 size = r->headers_in.content_length_n;
|
|
|
482
|
|
|
483 if (size > NGX_HTTP_DISCARD_BUFFER_SIZE) {
|
|
|
484 size = NGX_HTTP_DISCARD_BUFFER_SIZE;
|
|
|
485 }
|
|
|
486
|
|
|
487 n = r->connection->recv(r->connection, buffer, size);
|
|
|
488
|
|
|
489 if (n == NGX_ERROR) {
|
|
|
490
|
|
|
491 r->connection->error = 1;
|
|
|
492
|
|
|
493 /*
|
|
|
494 * if a client request body is discarded then we already set
|
|
|
495 * some HTTP response code for client and we can ignore the error
|
|
|
496 */
|
|
|
497
|
|
|
498 return NGX_OK;
|
|
|
499 }
|
|
|
500
|
|
|
501 if (n == NGX_AGAIN) {
|
|
|
502 return NGX_AGAIN;
|
|
|
503 }
|
|
|
504
|
|
|
505 r->headers_in.content_length_n -= n;
|
|
|
506
|
|
|
507 return NGX_OK;
|
|
|
508 }
|
