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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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0
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15
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28
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16 /*
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17 * on completion ngx_http_read_client_request_body() adds to
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18 * r->request_body->bufs one or two bufs:
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19 * *) one memory buf that was preread in r->header_in;
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20 * *) one memory or file buf that contains the rest of the body
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21 */
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0
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22
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50
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23 ngx_int_t
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24 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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28
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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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58
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34 if (r->request_body) {
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35 post_handler(r);
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36 return NGX_OK;
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37 }
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38
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50
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39 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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40 if (rb == NULL) {
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28
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41 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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42 }
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43
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44 r->request_body = rb;
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45
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46 if (r->headers_in.content_length_n <= 0) {
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47 post_handler(r);
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48 return NGX_OK;
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49 }
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50
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51 rb->post_handler = post_handler;
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52
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53 /*
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54 * set by ngx_pcalloc():
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55 *
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56 * rb->bufs = NULL;
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57 * rb->buf = NULL;
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58 * rb->rest = 0;
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59 */
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60
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0
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61 size = r->header_in->last - r->header_in->pos;
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62
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63 if (size) {
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64
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65 /* there is the pre-read part of the request body */
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66
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50
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67 b = ngx_calloc_buf(r->pool);
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68 if (b == NULL) {
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28
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69 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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70 }
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0
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71
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72 b->temporary = 1;
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73 b->start = b->pos = r->header_in->pos;
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74 b->end = b->last = r->header_in->last;
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75
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50
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76 rb->bufs = ngx_alloc_chain_link(r->pool);
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77 if (rb->bufs == NULL) {
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28
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78 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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79 }
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80
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81 rb->bufs->buf = b;
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82 rb->bufs->next = NULL;
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0
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83
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84 if (size >= r->headers_in.content_length_n) {
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85
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86 /* the whole request body was pre-read */
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87
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88 r->header_in->pos += r->headers_in.content_length_n;
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24
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89 r->request_length += r->headers_in.content_length_n;
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0
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90
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28
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91 post_handler(r);
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0
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92
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93 return NGX_OK;
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94 }
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95
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96 r->header_in->pos = r->header_in->last;
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24
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97 r->request_length += size;
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0
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98 }
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99
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100
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101 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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102
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28
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103 rb->rest = r->headers_in.content_length_n - size;
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0
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104
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28
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105 if (rb->rest < clcf->client_body_buffer_size
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0
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106 + (clcf->client_body_buffer_size >> 2))
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107 {
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28
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108 size = rb->rest;
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0
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109
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110 } else {
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111 size = clcf->client_body_buffer_size;
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112 }
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113
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50
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114 rb->buf = ngx_create_temp_buf(r->pool, size);
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115 if (rb->buf == NULL) {
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28
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116 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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117 }
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0
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118
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50
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119 cl = ngx_alloc_chain_link(r->pool);
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120 if (cl == 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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28
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124 cl->buf = rb->buf;
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125 cl->next = NULL;
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126
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127 if (rb->bufs) {
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128 rb->bufs->next = cl;
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0
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129
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130 } else {
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28
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131 rb->bufs = cl;
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0
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132 }
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133
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58
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134 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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135
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58
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136 return ngx_http_do_read_client_request_body(r);
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0
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137 }
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138
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139
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50
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140 static void
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58
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141 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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142 {
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58
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143 ngx_int_t rc;
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0
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144
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58
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145 if (r->connection->read->timedout) {
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0
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146 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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147 return;
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148 }
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149
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58
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150 rc = ngx_http_do_read_client_request_body(r);
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0
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151
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152 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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153 ngx_http_finalize_request(r, rc);
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154 }
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155 }
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156
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157
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50
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158 static ngx_int_t
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58
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159 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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160 {
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161 size_t size;
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162 ssize_t n;
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163 ngx_buf_t *b;
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28
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164 ngx_temp_file_t *tf;
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58
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165 ngx_connection_t *c;
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28
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166 ngx_http_request_body_t *rb;
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0
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167 ngx_http_core_loc_conf_t *clcf;
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168
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58
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169 c = r->connection;
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28
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170 rb = r->request_body;
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0
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171
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172 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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173 "http read client request body");
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174
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175 for ( ;; ) {
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28
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176 if (rb->buf->last == rb->buf->end) {
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177
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178 if (rb->temp_file == NULL) {
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50
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179 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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180 if (tf == NULL) {
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28
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181 return NGX_ERROR;
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182 }
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183
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184 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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185
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186 tf->file.fd = NGX_INVALID_FILE;
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187 tf->file.log = r->connection->log;
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188 tf->path = clcf->client_body_temp_path;
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189 tf->pool = r->pool;
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190 tf->warn = "a client request body is buffered "
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191 "to a temporary file";
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192
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193 rb->temp_file = tf;
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194
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195 }
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196
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197 n = ngx_write_chain_to_temp_file(rb->temp_file,
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198 rb->bufs->next ? rb->bufs->next:
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199 rb->bufs);
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0
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200
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201 /* TODO: n == 0 or not complete and level event */
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202
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203 if (n == NGX_ERROR) {
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204 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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205 }
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206
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28
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207 rb->temp_file->offset += n;
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208 rb->buf->last = rb->buf->start;
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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 size = rb->buf->end - rb->buf->last;
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0
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212
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28
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213 if (size > rb->rest) {
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214 size = rb->rest;
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0
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215 }
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216
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28
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217 n = c->recv(c, rb->buf->last, size);
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0
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218
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219 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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10
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220 "http client request body recv %z", n);
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0
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221
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222 if (n == NGX_AGAIN) {
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223 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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224 ngx_add_timer(c->read, clcf->client_body_timeout);
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225
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226 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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227 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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228 }
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229
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230 return NGX_AGAIN;
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231 }
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232
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233 if (n == 0) {
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234 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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235 "client closed prematurely connection");
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236 }
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237
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238 if (n == 0 || n == NGX_ERROR) {
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76
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239 c->closed = 1;
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0
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240 return NGX_HTTP_BAD_REQUEST;
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241 }
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242
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28
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243 rb->buf->last += n;
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244 rb->rest -= n;
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24
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245 r->request_length += n;
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0
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246
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28
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247 if (rb->rest == 0) {
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0
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248 break;
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249 }
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250
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28
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251 if (rb->buf->last < rb->buf->end) {
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0
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252 break;
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253 }
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254 }
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255
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256 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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28
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257 "http client request body rest %uz", rb->rest);
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0
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258
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28
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259 if (rb->rest) {
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0
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260 return NGX_AGAIN;
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261 }
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262
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28
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263 if (rb->temp_file) {
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0
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264
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265 /* save the last part */
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28
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266
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267 n = ngx_write_chain_to_temp_file(rb->temp_file,
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268 rb->bufs->next ? rb->bufs->next:
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269 rb->bufs);
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0
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270
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271 /* TODO: n == 0 or not complete and level event */
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272
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273 if (n == NGX_ERROR) {
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274 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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275 }
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276
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50
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277 b = ngx_calloc_buf(r->pool);
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278 if (b == NULL) {
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0
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279 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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280 }
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281
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282 b->in_file = 1;
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283 b->file_pos = 0;
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28
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284 b->file_last = rb->temp_file->file.offset;
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285 b->file = &rb->temp_file->file;
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0
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286
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28
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287 if (rb->bufs->next) {
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288 rb->bufs->next->buf = b;
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0
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289
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290 } else {
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28
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291 rb->bufs->buf = b;
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0
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292 }
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293 }
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294
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28
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295 rb->post_handler(r);
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0
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296
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297 return NGX_OK;
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298 }
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