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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_http.h>
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11
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12
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58
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13 static void ngx_http_read_client_request_body_handler(ngx_http_request_t *r);
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14 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r);
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182
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15 static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r,
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16 ngx_chain_t *body);
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17 static void ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc);
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18 static void ngx_http_read_discarded_body_handler(ngx_http_request_t *r);
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19 static ngx_int_t ngx_http_read_discarded_body(ngx_http_request_t *r);
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20
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0
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21
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28
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22 /*
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23 * on completion ngx_http_read_client_request_body() adds to
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24 * r->request_body->bufs one or two bufs:
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25 * *) one memory buf that was preread in r->header_in;
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26 * *) one memory or file buf that contains the rest of the body
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27 */
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0
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28
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50
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29 ngx_int_t
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30 ngx_http_read_client_request_body(ngx_http_request_t *r,
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31 ngx_http_client_body_handler_pt post_handler)
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0
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32 {
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212
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33 size_t preread;
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34 ssize_t size;
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0
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35 ngx_buf_t *b;
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182
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36 ngx_chain_t *cl, **next;
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238
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37 ngx_temp_file_t *tf;
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28
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38 ngx_http_request_body_t *rb;
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0
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39 ngx_http_core_loc_conf_t *clcf;
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40
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86
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41 if (r->request_body || r->discard_body) {
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58
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42 post_handler(r);
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43 return NGX_OK;
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44 }
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45
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50
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46 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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47 if (rb == NULL) {
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28
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48 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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49 }
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50
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51 r->request_body = rb;
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52
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238
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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 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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59
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60 if (r->headers_in.content_length_n == 0) {
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61
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62 if (r->request_body_in_file_only) {
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63 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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64 if (tf == NULL) {
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65 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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66 }
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67
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68 tf->file.fd = NGX_INVALID_FILE;
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69 tf->file.log = r->connection->log;
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70 tf->path = clcf->client_body_temp_path;
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71 tf->pool = r->pool;
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72 tf->warn = "a client request body is buffered to a temporary file";
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73 tf->log_level = r->request_body_file_log_level;
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74 tf->persistent = r->request_body_in_persistent_file;
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75
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76 if (r->request_body_file_group_access) {
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77 tf->mode = 0660;
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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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83 tf->persistent, tf->mode)
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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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166 r->read_event_handler = ngx_http_read_client_request_body_handler;
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167
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168 return ngx_http_do_read_client_request_body(r);
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169 }
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170
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171 next = &rb->bufs->next;
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172
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173 } else {
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174 b = NULL;
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175 rb->rest = r->headers_in.content_length_n;
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176 next = &rb->bufs;
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0
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177 }
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178
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182
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179 size = clcf->client_body_buffer_size;
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180 size += size >> 2;
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0
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181
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212
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182 if (rb->rest < size) {
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183 size = (ssize_t) rb->rest;
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0
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184
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182
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185 if (r->request_body_in_single_buf) {
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186 size += preread;
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187 }
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188
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0
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189 } else {
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190 size = clcf->client_body_buffer_size;
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182
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191
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192 /* disable copying buffer for r->request_body_in_single_buf */
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193 b = NULL;
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0
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194 }
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195
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50
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196 rb->buf = ngx_create_temp_buf(r->pool, size);
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197 if (rb->buf == NULL) {
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28
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198 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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199 }
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0
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200
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50
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201 cl = ngx_alloc_chain_link(r->pool);
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202 if (cl == NULL) {
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28
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203 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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204 }
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0
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205
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28
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206 cl->buf = rb->buf;
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207 cl->next = NULL;
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208
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182
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209 if (b && r->request_body_in_single_buf) {
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210 size = b->last - b->pos;
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211 ngx_memcpy(rb->buf->pos, b->pos, size);
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212 rb->buf->last += size;
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213
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214 next = &rb->bufs;
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215 }
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216
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217 *next = cl;
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218
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219 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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220 rb->to_write = rb->bufs;
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0
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221
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222 } else {
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182
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223 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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224 }
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225
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58
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226 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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227
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58
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228 return ngx_http_do_read_client_request_body(r);
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0
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229 }
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230
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231
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50
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232 static void
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58
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233 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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234 {
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58
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235 ngx_int_t rc;
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0
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236
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58
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237 if (r->connection->read->timedout) {
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126
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238 r->connection->timedout = 1;
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182
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239 ngx_http_finalize_request_body(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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240 return;
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241 }
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242
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58
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243 rc = ngx_http_do_read_client_request_body(r);
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0
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244
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245 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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182
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246 ngx_http_finalize_request_body(r, rc);
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0
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247 }
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248 }
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249
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250
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50
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251 static ngx_int_t
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58
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252 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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253 {
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254 size_t size;
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255 ssize_t n;
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256 ngx_buf_t *b;
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58
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257 ngx_connection_t *c;
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28
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258 ngx_http_request_body_t *rb;
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0
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259 ngx_http_core_loc_conf_t *clcf;
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260
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58
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261 c = r->connection;
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28
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262 rb = r->request_body;
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0
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263
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264 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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265 "http read client request body");
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266
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267 for ( ;; ) {
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256
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268 for ( ;; ) {
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269 if (rb->buf->last == rb->buf->end) {
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270
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271 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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272 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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273 }
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28
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274
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256
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275 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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276 rb->buf->last = rb->buf->start;
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277 }
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278
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279 size = rb->buf->end - rb->buf->last;
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280
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281 if ((off_t) size > rb->rest) {
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282 size = (size_t) rb->rest;
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0
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283 }
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284
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256
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285 n = c->recv(c, rb->buf->last, size);
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286
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287 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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288 "http client request body recv %z", n);
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0
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289
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256
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290 if (n == NGX_AGAIN) {
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291 break;
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292 }
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293
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294 if (n == 0) {
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295 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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296 "client closed prematurely connection");
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297 }
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0
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298
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256
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299 if (n == 0 || n == NGX_ERROR) {
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300 c->error = 1;
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301 return NGX_HTTP_BAD_REQUEST;
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302 }
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303
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304 rb->buf->last += n;
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305 rb->rest -= n;
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306 r->request_length += n;
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307
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308 if (rb->rest == 0) {
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309 break;
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310 }
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311
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312 if (rb->buf->last < rb->buf->end) {
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313 break;
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314 }
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0
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315 }
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316
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317 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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256
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318 "http client request body rest %uz", rb->rest);
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0
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319
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28
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320 if (rb->rest == 0) {
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0
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321 break;
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322 }
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323
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256
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324 if (!c->read->ready) {
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325 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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326 ngx_add_timer(c->read, clcf->client_body_timeout);
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0
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327
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256
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328 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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329 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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330 }
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122
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331
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256
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332 return NGX_AGAIN;
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122
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333 }
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0
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334 }
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335
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122
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336 if (c->read->timer_set) {
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337 ngx_del_timer(c->read);
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338 }
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339
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182
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340 if (rb->temp_file || r->request_body_in_file_only) {
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0
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341
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342 /* save the last part */
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28
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343
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182
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344 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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345 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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346 }
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347
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50
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348 b = ngx_calloc_buf(r->pool);
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349 if (b == NULL) {
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0
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350 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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351 }
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352
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353 b->in_file = 1;
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354 b->file_pos = 0;
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28
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355 b->file_last = rb->temp_file->file.offset;
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356 b->file = &rb->temp_file->file;
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0
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357
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28
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358 if (rb->bufs->next) {
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359 rb->bufs->next->buf = b;
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0
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360
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|
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361 } else {
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28
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362 rb->bufs->buf = b;
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0
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363 }
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364 }
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365
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182
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366 if (r->request_body_in_file_only && rb->bufs->next) {
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367 rb->bufs = rb->bufs->next;
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368 }
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369
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28
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370 rb->post_handler(r);
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0
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371
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372 return NGX_OK;
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373 }
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182
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374
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375
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376 static ngx_int_t
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377 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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378 {
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379 ssize_t n;
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380 ngx_temp_file_t *tf;
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381 ngx_http_request_body_t *rb;
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382 ngx_http_core_loc_conf_t *clcf;
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383
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384 rb = r->request_body;
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385
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386 if (rb->temp_file == NULL) {
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387 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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388 if (tf == NULL) {
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389 return NGX_ERROR;
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390 }
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391
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392 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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393
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394 tf->file.fd = NGX_INVALID_FILE;
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395 tf->file.log = r->connection->log;
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396 tf->path = clcf->client_body_temp_path;
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397 tf->pool = r->pool;
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398 tf->warn = "a client request body is buffered to a temporary file";
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186
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399 tf->log_level = r->request_body_file_log_level;
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182
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400 tf->persistent = r->request_body_in_persistent_file;
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401
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402 if (r->request_body_file_group_access) {
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403 tf->mode = 0660;
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404 }
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405
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406 rb->temp_file = tf;
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407 }
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408
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409 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
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410
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|
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411 /* TODO: n == 0 or not complete and level event */
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412
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413 if (n == NGX_ERROR) {
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414 return NGX_ERROR;
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415 }
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416
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417 rb->temp_file->offset += n;
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418
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419 return NGX_OK;
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420 }
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421
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422
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|
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423 static void
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424 ngx_http_finalize_request_body(ngx_http_request_t *r, ngx_int_t rc)
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425 {
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|
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426 if (r->request_body->temp_file
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427 && r->request_body_in_persistent_file
|
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428 && r->request_body_delete_incomplete_file)
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|
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429 {
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|
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430 if (ngx_delete_file(r->request_body->temp_file->file.name.data)
|
|
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431 == NGX_FILE_ERROR)
|
|
|
432 {
|
|
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433 ngx_log_error(NGX_LOG_CRIT, r->connection->log, ngx_errno,
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|
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434 ngx_delete_file_n " \"%s\" failed",
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|
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435 r->request_body->temp_file->file.name.data);
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|
|
436 }
|
|
|
437 }
|
|
|
438
|
|
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439 ngx_http_finalize_request(r, rc);
|
|
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440 }
|
|
|
441
|
|
|
442
|
|
|
443 ngx_int_t
|
|
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444 ngx_http_discard_body(ngx_http_request_t *r)
|
|
|
445 {
|
|
|
446 ssize_t size;
|
|
|
447 ngx_event_t *rev;
|
|
|
448
|
|
222
|
449 if (r != r->main || r->discard_body) {
|
|
182
|
450 return NGX_OK;
|
|
|
451 }
|
|
|
452
|
|
|
453 rev = r->connection->read;
|
|
|
454
|
|
|
455 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
|
|
|
456
|
|
|
457 if (rev->timer_set) {
|
|
|
458 ngx_del_timer(rev);
|
|
|
459 }
|
|
|
460
|
|
230
|
461 r->discard_body = 1;
|
|
|
462
|
|
182
|
463 if (r->headers_in.content_length_n <= 0) {
|
|
|
464 return NGX_OK;
|
|
|
465 }
|
|
|
466
|
|
|
467 size = r->header_in->last - r->header_in->pos;
|
|
|
468
|
|
|
469 if (size) {
|
|
|
470 if (r->headers_in.content_length_n > size) {
|
|
|
471 r->headers_in.content_length_n -= size;
|
|
|
472
|
|
|
473 } else {
|
|
212
|
474 r->header_in->pos += (size_t) r->headers_in.content_length_n;
|
|
182
|
475 r->headers_in.content_length_n = 0;
|
|
|
476 return NGX_OK;
|
|
|
477 }
|
|
|
478 }
|
|
|
479
|
|
|
480 r->read_event_handler = ngx_http_read_discarded_body_handler;
|
|
|
481
|
|
|
482 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
483 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
484 }
|
|
|
485
|
|
|
486 return ngx_http_read_discarded_body(r);
|
|
|
487 }
|
|
|
488
|
|
|
489
|
|
|
490 static void
|
|
|
491 ngx_http_read_discarded_body_handler(ngx_http_request_t *r)
|
|
|
492 {
|
|
|
493 ngx_int_t rc;
|
|
|
494
|
|
|
495 rc = ngx_http_read_discarded_body(r);
|
|
|
496
|
|
|
497 if (rc == NGX_AGAIN) {
|
|
|
498 if (ngx_handle_read_event(r->connection->read, 0) == NGX_ERROR) {
|
|
|
499 ngx_http_finalize_request(r, rc);
|
|
|
500 return;
|
|
|
501 }
|
|
|
502 }
|
|
|
503
|
|
|
504 if (rc != NGX_OK) {
|
|
|
505 ngx_http_finalize_request(r, rc);
|
|
|
506 }
|
|
|
507 }
|
|
|
508
|
|
|
509
|
|
|
510 static ngx_int_t
|
|
|
511 ngx_http_read_discarded_body(ngx_http_request_t *r)
|
|
|
512 {
|
|
212
|
513 size_t size;
|
|
|
514 ssize_t n;
|
|
182
|
515 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
516
|
|
|
517 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
518 "http read discarded body");
|
|
|
519
|
|
|
520 if (r->headers_in.content_length_n == 0) {
|
|
|
521 return NGX_OK;
|
|
|
522 }
|
|
|
523
|
|
212
|
524 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ?
|
|
|
525 NGX_HTTP_DISCARD_BUFFER_SIZE:
|
|
|
526 (size_t) r->headers_in.content_length_n;
|
|
182
|
527
|
|
|
528 n = r->connection->recv(r->connection, buffer, size);
|
|
|
529
|
|
|
530 if (n == NGX_ERROR) {
|
|
|
531
|
|
|
532 r->connection->error = 1;
|
|
|
533
|
|
|
534 /*
|
|
|
535 * if a client request body is discarded then we already set
|
|
|
536 * some HTTP response code for client and we can ignore the error
|
|
|
537 */
|
|
|
538
|
|
|
539 return NGX_OK;
|
|
|
540 }
|
|
|
541
|
|
|
542 if (n == NGX_AGAIN) {
|
|
|
543 return NGX_AGAIN;
|
|
|
544 }
|
|
|
545
|
|
|
546 r->headers_in.content_length_n -= n;
|
|
|
547
|
|
|
548 return NGX_OK;
|
|
|
549 }
|
