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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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50
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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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50
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24 ngx_int_t
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25 ngx_http_read_client_request_body(ngx_http_request_t *r,
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26 ngx_http_client_body_handler_pt post_handler)
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28
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27
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0
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28 {
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29 ssize_t size;
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30 ngx_buf_t *b;
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31 ngx_chain_t *cl;
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50
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32 ngx_connection_t *c;
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28
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33 ngx_http_request_body_t *rb;
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0
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34 ngx_http_core_loc_conf_t *clcf;
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35
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50
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36 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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37 if (rb == NULL) {
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28
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38 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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39 }
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40
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41 r->request_body = rb;
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42
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50
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43 /* STUB */
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44 if (r->file.fd != NGX_INVALID_FILE) {
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45 if (ngx_close_file(r->file.fd) == NGX_FILE_ERROR) {
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46 ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
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47 ngx_close_file_n " \"%V\" failed", &r->file.name);
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48 }
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49 r->file.fd = NGX_INVALID_FILE;
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50 }
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51 /**/
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52
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28
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53 if (r->headers_in.content_length_n <= 0) {
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54 post_handler(r);
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55 return NGX_OK;
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56 }
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57
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58 rb->post_handler = post_handler;
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59
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60 /*
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61 * set by ngx_pcalloc():
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62 *
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63 * rb->bufs = NULL;
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64 * rb->buf = NULL;
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65 * rb->rest = 0;
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66 */
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67
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0
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68 size = r->header_in->last - r->header_in->pos;
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69
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70 if (size) {
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71
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72 /* there is the pre-read part of the request body */
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73
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50
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74 b = ngx_calloc_buf(r->pool);
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75 if (b == NULL) {
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28
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76 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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77 }
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0
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78
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79 b->temporary = 1;
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80 b->start = b->pos = r->header_in->pos;
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81 b->end = b->last = r->header_in->last;
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82
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50
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83 rb->bufs = ngx_alloc_chain_link(r->pool);
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84 if (rb->bufs == NULL) {
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28
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85 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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86 }
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87
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88 rb->bufs->buf = b;
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89 rb->bufs->next = NULL;
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0
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90
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91 if (size >= r->headers_in.content_length_n) {
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92
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93 /* the whole request body was pre-read */
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94
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95 r->header_in->pos += r->headers_in.content_length_n;
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24
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96 r->request_length += r->headers_in.content_length_n;
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0
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97
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28
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98 post_handler(r);
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0
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99
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100 return NGX_OK;
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101 }
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102
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103 r->header_in->pos = r->header_in->last;
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24
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104 r->request_length += size;
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0
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105 }
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106
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107
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108 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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109
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28
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110 rb->rest = r->headers_in.content_length_n - size;
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0
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111
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28
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112 if (rb->rest < clcf->client_body_buffer_size
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0
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113 + (clcf->client_body_buffer_size >> 2))
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114 {
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28
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115 size = rb->rest;
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0
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116
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117 } else {
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118 size = clcf->client_body_buffer_size;
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119 }
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120
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50
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121 rb->buf = ngx_create_temp_buf(r->pool, size);
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122 if (rb->buf == NULL) {
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28
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123 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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124 }
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0
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125
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126 cl = ngx_alloc_chain_link(r->pool);
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127 if (cl == NULL) {
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28
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128 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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129 }
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0
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130
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28
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131 cl->buf = rb->buf;
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132 cl->next = NULL;
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133
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134 if (rb->bufs) {
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135 rb->bufs->next = cl;
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0
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136
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137 } else {
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28
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138 rb->bufs = cl;
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0
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139 }
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140
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50
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141 c = r->connection;
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0
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142
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50
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143 c->read->event_handler = ngx_http_read_client_request_body_handler;
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144
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145 return ngx_http_do_read_client_request_body(r, c);
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0
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146 }
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147
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148
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50
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149 static void
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150 ngx_http_read_client_request_body_handler(ngx_event_t *rev)
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0
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151 {
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152 ngx_int_t rc;
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153 ngx_connection_t *c;
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154 ngx_http_request_t *r;
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155
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156 c = rev->data;
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157 r = c->data;
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158
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159 if (rev->timedout) {
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160 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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161 return;
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162 }
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163
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28
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164 rc = ngx_http_do_read_client_request_body(r, c);
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0
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165
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166 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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167 ngx_http_finalize_request(r, rc);
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168 }
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169 }
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170
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171
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50
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172 static ngx_int_t
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173 ngx_http_do_read_client_request_body(ngx_http_request_t *r,
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174 ngx_connection_t *c)
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0
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175 {
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176 size_t size;
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177 ssize_t n;
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178 ngx_buf_t *b;
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28
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179 ngx_temp_file_t *tf;
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180 ngx_http_request_body_t *rb;
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0
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181 ngx_http_core_loc_conf_t *clcf;
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182
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28
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183 rb = r->request_body;
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0
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184
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185 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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186 "http read client request body");
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187
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188 for ( ;; ) {
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28
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189 if (rb->buf->last == rb->buf->end) {
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190
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191 if (rb->temp_file == NULL) {
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50
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192 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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193 if (tf == NULL) {
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28
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194 return NGX_ERROR;
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195 }
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196
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197 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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198
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199 tf->file.fd = NGX_INVALID_FILE;
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200 tf->file.log = r->connection->log;
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201 tf->path = clcf->client_body_temp_path;
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202 tf->pool = r->pool;
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203 tf->warn = "a client request body is buffered "
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204 "to a temporary file";
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205
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206 rb->temp_file = tf;
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207
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208 }
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209
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210 n = ngx_write_chain_to_temp_file(rb->temp_file,
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211 rb->bufs->next ? rb->bufs->next:
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212 rb->bufs);
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0
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213
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214 /* TODO: n == 0 or not complete and level event */
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215
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216 if (n == NGX_ERROR) {
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217 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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218 }
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219
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220 rb->temp_file->offset += n;
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0
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221
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28
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222 rb->buf->pos = rb->buf->start;
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223 rb->buf->last = rb->buf->start;
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0
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224 }
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225
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28
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226 size = rb->buf->end - rb->buf->last;
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0
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227
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28
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228 if (size > rb->rest) {
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229 size = rb->rest;
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0
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230 }
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231
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28
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232 n = c->recv(c, rb->buf->last, size);
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0
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233
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234 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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10
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235 "http client request body recv %z", n);
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0
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236
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237 if (n == NGX_AGAIN) {
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238 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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239 ngx_add_timer(c->read, clcf->client_body_timeout);
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240
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241 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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242 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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243 }
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244
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245 return NGX_AGAIN;
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246 }
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247
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248 if (n == 0) {
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249 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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250 "client closed prematurely connection");
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251 }
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252
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253 if (n == 0 || n == NGX_ERROR) {
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254 r->closed = 1;
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255 return NGX_HTTP_BAD_REQUEST;
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256 }
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257
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258 rb->buf->last += n;
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259 rb->rest -= n;
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24
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260 r->request_length += n;
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0
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261
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28
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262 if (rb->rest == 0) {
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0
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263 break;
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264 }
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265
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266 if (rb->buf->last < rb->buf->end) {
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0
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267 break;
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268 }
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269 }
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270
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271 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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272 "http client request body rest %uz", rb->rest);
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0
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273
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28
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274 if (rb->rest) {
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0
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275 return NGX_AGAIN;
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276 }
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277
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28
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278 if (rb->temp_file) {
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0
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279
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280 /* save the last part */
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28
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281
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282 n = ngx_write_chain_to_temp_file(rb->temp_file,
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283 rb->bufs->next ? rb->bufs->next:
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284 rb->bufs);
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0
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285
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286 /* TODO: n == 0 or not complete and level event */
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287
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288 if (n == NGX_ERROR) {
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289 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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290 }
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291
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50
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292 b = ngx_calloc_buf(r->pool);
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293 if (b == NULL) {
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0
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294 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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295 }
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296
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297 b->in_file = 1;
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298 b->file_pos = 0;
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28
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299 b->file_last = rb->temp_file->file.offset;
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300 b->file = &rb->temp_file->file;
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0
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301
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28
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302 if (rb->bufs->next) {
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303 rb->bufs->next->buf = b;
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0
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304
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305 } else {
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28
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306 rb->bufs->buf = b;
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0
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307 }
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308 }
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309
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28
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310 rb->post_handler(r);
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0
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311
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312 return NGX_OK;
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313 }
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