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