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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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13 static void ngx_http_read_client_request_body_handler(ngx_event_t *rev);
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28
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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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15 ngx_connection_t *c);
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0
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16
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28
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17 /*
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18 * on completion ngx_http_read_client_request_body() adds to
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19 * r->request_body->bufs one or two bufs:
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20 * *) one memory buf that was preread in r->header_in;
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21 * *) one memory or file buf that contains the rest of the body
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22 */
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0
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23
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28
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24 ngx_int_t ngx_http_read_client_request_body(ngx_http_request_t *r,
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25 ngx_http_client_body_handler_pt post_handler)
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26
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0
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27 {
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28 ssize_t size;
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29 ngx_buf_t *b;
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30 ngx_chain_t *cl;
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28
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31 ngx_http_request_body_t *rb;
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0
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32 ngx_http_core_loc_conf_t *clcf;
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33
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28
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34 if (!(rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t)))) {
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35 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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36 }
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37
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38 r->request_body = rb;
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39
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40 if (r->headers_in.content_length_n <= 0) {
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41 post_handler(r);
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42 return NGX_OK;
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43 }
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44
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45 rb->post_handler = post_handler;
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46
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47 /*
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48 * set by ngx_pcalloc():
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49 *
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50 * rb->bufs = NULL;
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51 * rb->buf = NULL;
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52 * rb->rest = 0;
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53 */
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54
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0
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55 size = r->header_in->last - r->header_in->pos;
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56
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57 if (size) {
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58
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59 /* there is the pre-read part of the request body */
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60
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28
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61 if (!(b = ngx_calloc_buf(r->pool))) {
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62 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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63 }
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0
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64
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65 b->temporary = 1;
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66 b->start = b->pos = r->header_in->pos;
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67 b->end = b->last = r->header_in->last;
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68
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28
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69 if (!(rb->bufs = ngx_alloc_chain_link(r->pool))) {
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70 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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71 }
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72
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73 rb->bufs->buf = b;
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74 rb->bufs->next = NULL;
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0
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75
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76 if (size >= r->headers_in.content_length_n) {
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77
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78 /* the whole request body was pre-read */
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79
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80 r->header_in->pos += r->headers_in.content_length_n;
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24
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81 r->request_length += r->headers_in.content_length_n;
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0
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82
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28
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83 post_handler(r);
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0
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84
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85 return NGX_OK;
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86 }
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87
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88 r->header_in->pos = r->header_in->last;
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24
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89 r->request_length += size;
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0
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90 }
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91
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92
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93 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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94
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28
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95 rb->rest = r->headers_in.content_length_n - size;
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0
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96
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28
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97 if (rb->rest < clcf->client_body_buffer_size
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0
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98 + (clcf->client_body_buffer_size >> 2))
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99 {
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28
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100 size = rb->rest;
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0
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101
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102 } else {
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103 size = clcf->client_body_buffer_size;
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104 }
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105
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28
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106 if (!(rb->buf = ngx_create_temp_buf(r->pool, size))) {
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107 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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108 }
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0
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109
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28
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110 if (!(cl = ngx_alloc_chain_link(r->pool))) {
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111 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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112 }
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0
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113
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28
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114 cl->buf = rb->buf;
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115 cl->next = NULL;
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116
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117 if (rb->bufs) {
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118 rb->bufs->next = cl;
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0
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119
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120 } else {
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28
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121 rb->bufs = cl;
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0
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122 }
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123
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124 r->connection->read->event_handler =
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125 ngx_http_read_client_request_body_handler;
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126
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28
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127 return ngx_http_do_read_client_request_body(r, r->connection);
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0
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128 }
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129
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130
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131 static void ngx_http_read_client_request_body_handler(ngx_event_t *rev)
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132 {
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133 ngx_int_t rc;
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134 ngx_connection_t *c;
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135 ngx_http_request_t *r;
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136
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137 c = rev->data;
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138 r = c->data;
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139
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140 if (rev->timedout) {
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141 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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142 return;
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143 }
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144
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28
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145 rc = ngx_http_do_read_client_request_body(r, c);
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0
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146
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147 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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148 ngx_http_finalize_request(r, rc);
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149 }
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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 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r,
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154 ngx_connection_t *c)
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0
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155 {
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156 size_t size;
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157 ssize_t n;
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158 ngx_buf_t *b;
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28
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159 ngx_temp_file_t *tf;
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160 ngx_http_request_body_t *rb;
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0
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161 ngx_http_core_loc_conf_t *clcf;
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162
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28
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163 rb = r->request_body;
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0
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164
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165 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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166 "http read client request body");
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167
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168 for ( ;; ) {
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28
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169 if (rb->buf->last == rb->buf->end) {
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170
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171 if (rb->temp_file == NULL) {
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172 if (!(tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t)))) {
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173 return NGX_ERROR;
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174 }
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175
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176 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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177
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178 tf->file.fd = NGX_INVALID_FILE;
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179 tf->file.log = r->connection->log;
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180 tf->path = clcf->client_body_temp_path;
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181 tf->pool = r->pool;
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182 tf->warn = "a client request body is buffered "
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183 "to a temporary file";
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184
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185 rb->temp_file = tf;
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186
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187 }
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188
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189 n = ngx_write_chain_to_temp_file(rb->temp_file,
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190 rb->bufs->next ? rb->bufs->next:
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191 rb->bufs);
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0
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192
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193 /* TODO: n == 0 or not complete and level event */
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194
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195 if (n == NGX_ERROR) {
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196 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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197 }
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198
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28
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199 rb->temp_file->offset += n;
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0
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200
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28
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201 rb->buf->pos = rb->buf->start;
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202 rb->buf->last = rb->buf->start;
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0
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203 }
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204
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28
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205 size = rb->buf->end - rb->buf->last;
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0
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206
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28
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207 if (size > rb->rest) {
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208 size = rb->rest;
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0
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209 }
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210
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28
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211 n = c->recv(c, rb->buf->last, size);
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0
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212
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213 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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10
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214 "http client request body recv %z", n);
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0
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215
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216 if (n == NGX_AGAIN) {
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217 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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218 ngx_add_timer(c->read, clcf->client_body_timeout);
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219
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220 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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221 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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222 }
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223
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224 return NGX_AGAIN;
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225 }
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226
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227 if (n == 0) {
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228 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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229 "client closed prematurely connection");
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230 }
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231
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232 if (n == 0 || n == NGX_ERROR) {
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233 r->closed = 1;
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234 return NGX_HTTP_BAD_REQUEST;
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235 }
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236
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28
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237 rb->buf->last += n;
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238 rb->rest -= n;
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24
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239 r->request_length += n;
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0
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240
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28
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241 if (rb->rest == 0) {
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0
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242 break;
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243 }
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244
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28
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245 if (rb->buf->last < rb->buf->end) {
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0
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246 break;
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247 }
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248 }
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249
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250 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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28
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251 "http client request body rest %uz", rb->rest);
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0
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252
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28
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253 if (rb->rest) {
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0
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254 return NGX_AGAIN;
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255 }
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256
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28
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257 if (rb->temp_file) {
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0
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258
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259 /* save the last part */
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28
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260
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261 n = ngx_write_chain_to_temp_file(rb->temp_file,
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262 rb->bufs->next ? rb->bufs->next:
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263 rb->bufs);
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0
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264
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265 /* TODO: n == 0 or not complete and level event */
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266
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267 if (n == NGX_ERROR) {
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268 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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269 }
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270
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271 if (!(b = ngx_calloc_buf(r->pool))) {
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272 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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273 }
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274
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275 b->in_file = 1;
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276 b->file_pos = 0;
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28
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277 b->file_last = rb->temp_file->file.offset;
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278 b->file = &rb->temp_file->file;
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0
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279
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28
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280 if (rb->bufs->next) {
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281 rb->bufs->next->buf = b;
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0
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282
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283 } else {
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28
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284 rb->bufs->buf = b;
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0
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285 }
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286 }
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287
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28
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288 rb->post_handler(r);
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0
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289
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290 return NGX_OK;
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291 }
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