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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_http.h>
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10
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11
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58
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12 static void ngx_http_read_client_request_body_handler(ngx_http_request_t *r);
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13 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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14 static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r,
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15 ngx_chain_t *body);
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326
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16 static void ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r);
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17 static ngx_int_t ngx_http_read_discarded_request_body(ngx_http_request_t *r);
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438
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18 static ngx_int_t ngx_http_test_expect(ngx_http_request_t *r);
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182
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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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518
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40 r->main->count++;
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41
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86
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42 if (r->request_body || r->discard_body) {
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58
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43 post_handler(r);
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44 return NGX_OK;
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45 }
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46
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438
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47 if (ngx_http_test_expect(r) != NGX_OK) {
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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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50
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51 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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52 if (rb == NULL) {
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28
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53 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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54 }
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55
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56 r->request_body = rb;
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57
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238
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58 if (r->headers_in.content_length_n < 0) {
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59 post_handler(r);
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60 return NGX_OK;
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61 }
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62
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63 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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64
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65 if (r->headers_in.content_length_n == 0) {
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66
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67 if (r->request_body_in_file_only) {
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68 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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69 if (tf == NULL) {
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70 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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71 }
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72
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73 tf->file.fd = NGX_INVALID_FILE;
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74 tf->file.log = r->connection->log;
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75 tf->path = clcf->client_body_temp_path;
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76 tf->pool = r->pool;
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77 tf->warn = "a client request body is buffered to a temporary file";
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78 tf->log_level = r->request_body_file_log_level;
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79 tf->persistent = r->request_body_in_persistent_file;
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278
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80 tf->clean = r->request_body_in_clean_file;
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238
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81
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82 if (r->request_body_file_group_access) {
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276
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83 tf->access = 0660;
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238
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84 }
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85
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86 rb->temp_file = tf;
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87
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88 if (ngx_create_temp_file(&tf->file, tf->path, tf->pool,
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278
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89 tf->persistent, tf->clean, tf->access)
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238
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90 != NGX_OK)
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91 {
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92 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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93 }
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94 }
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95
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28
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96 post_handler(r);
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318
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97
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28
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98 return NGX_OK;
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99 }
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100
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101 rb->post_handler = post_handler;
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102
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103 /*
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104 * set by ngx_pcalloc():
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105 *
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106 * rb->bufs = NULL;
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107 * rb->buf = NULL;
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108 * rb->rest = 0;
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109 */
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110
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182
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111 preread = r->header_in->last - r->header_in->pos;
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0
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112
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182
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113 if (preread) {
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0
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114
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115 /* there is the pre-read part of the request body */
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116
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182
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117 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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118 "http client request body preread %uz", preread);
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119
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50
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120 b = ngx_calloc_buf(r->pool);
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121 if (b == NULL) {
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28
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122 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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123 }
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0
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124
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125 b->temporary = 1;
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182
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126 b->start = r->header_in->pos;
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127 b->pos = r->header_in->pos;
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128 b->last = r->header_in->last;
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129 b->end = r->header_in->end;
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0
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130
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50
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131 rb->bufs = ngx_alloc_chain_link(r->pool);
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132 if (rb->bufs == NULL) {
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28
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133 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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134 }
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135
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136 rb->bufs->buf = b;
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137 rb->bufs->next = NULL;
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0
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138
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216
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139 rb->buf = b;
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140
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214
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141 if ((off_t) preread >= r->headers_in.content_length_n) {
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0
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142
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143 /* the whole request body was pre-read */
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144
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212
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145 r->header_in->pos += (size_t) r->headers_in.content_length_n;
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24
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146 r->request_length += r->headers_in.content_length_n;
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0
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147
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182
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148 if (r->request_body_in_file_only) {
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149 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
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150 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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151 }
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152 }
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153
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28
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154 post_handler(r);
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0
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155
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156 return NGX_OK;
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157 }
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158
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182
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159 /*
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160 * to not consider the body as pipelined request in
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161 * ngx_http_set_keepalive()
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162 */
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0
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163 r->header_in->pos = r->header_in->last;
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182
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164
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165 r->request_length += preread;
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166
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167 rb->rest = r->headers_in.content_length_n - preread;
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168
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214
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169 if (rb->rest <= (off_t) (b->end - b->last)) {
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182
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170
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171 /* the whole request body may be placed in r->header_in */
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172
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276
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173 rb->to_write = rb->bufs;
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174
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182
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175 r->read_event_handler = ngx_http_read_client_request_body_handler;
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176
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177 return ngx_http_do_read_client_request_body(r);
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178 }
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179
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180 next = &rb->bufs->next;
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181
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182 } else {
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183 b = NULL;
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184 rb->rest = r->headers_in.content_length_n;
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185 next = &rb->bufs;
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0
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186 }
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187
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182
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188 size = clcf->client_body_buffer_size;
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189 size += size >> 2;
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0
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190
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212
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191 if (rb->rest < size) {
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192 size = (ssize_t) rb->rest;
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0
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193
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182
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194 if (r->request_body_in_single_buf) {
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195 size += preread;
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196 }
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197
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0
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198 } else {
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199 size = clcf->client_body_buffer_size;
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182
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200
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201 /* disable copying buffer for r->request_body_in_single_buf */
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202 b = NULL;
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0
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203 }
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204
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50
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205 rb->buf = ngx_create_temp_buf(r->pool, size);
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206 if (rb->buf == NULL) {
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28
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207 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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208 }
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0
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209
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50
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210 cl = ngx_alloc_chain_link(r->pool);
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211 if (cl == NULL) {
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28
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212 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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213 }
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0
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214
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28
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215 cl->buf = rb->buf;
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216 cl->next = NULL;
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217
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182
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218 if (b && r->request_body_in_single_buf) {
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219 size = b->last - b->pos;
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220 ngx_memcpy(rb->buf->pos, b->pos, size);
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221 rb->buf->last += size;
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222
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223 next = &rb->bufs;
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224 }
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225
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226 *next = cl;
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227
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228 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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229 rb->to_write = rb->bufs;
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0
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230
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231 } else {
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182
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232 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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233 }
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234
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58
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235 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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236
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58
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237 return ngx_http_do_read_client_request_body(r);
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0
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238 }
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239
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240
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50
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241 static void
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58
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242 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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243 {
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58
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244 ngx_int_t rc;
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0
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245
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58
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246 if (r->connection->read->timedout) {
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126
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247 r->connection->timedout = 1;
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278
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248 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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249 return;
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250 }
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251
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58
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252 rc = ngx_http_do_read_client_request_body(r);
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0
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253
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254 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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278
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255 ngx_http_finalize_request(r, rc);
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0
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256 }
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257 }
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258
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259
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50
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260 static ngx_int_t
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58
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261 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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262 {
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263 size_t size;
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264 ssize_t n;
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265 ngx_buf_t *b;
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58
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266 ngx_connection_t *c;
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28
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267 ngx_http_request_body_t *rb;
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0
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268 ngx_http_core_loc_conf_t *clcf;
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269
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58
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270 c = r->connection;
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28
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271 rb = r->request_body;
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0
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272
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273 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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274 "http read client request body");
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275
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276 for ( ;; ) {
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256
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277 for ( ;; ) {
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278 if (rb->buf->last == rb->buf->end) {
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279
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280 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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281 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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282 }
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28
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283
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256
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284 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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285 rb->buf->last = rb->buf->start;
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286 }
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287
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288 size = rb->buf->end - rb->buf->last;
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289
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290 if ((off_t) size > rb->rest) {
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291 size = (size_t) rb->rest;
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0
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292 }
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293
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256
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294 n = c->recv(c, rb->buf->last, size);
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295
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296 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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297 "http client request body recv %z", n);
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0
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298
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256
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299 if (n == NGX_AGAIN) {
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300 break;
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301 }
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302
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303 if (n == 0) {
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304 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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305 "client closed prematurely connection");
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306 }
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0
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307
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256
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308 if (n == 0 || n == NGX_ERROR) {
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309 c->error = 1;
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310 return NGX_HTTP_BAD_REQUEST;
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311 }
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312
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313 rb->buf->last += n;
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314 rb->rest -= n;
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315 r->request_length += n;
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316
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317 if (rb->rest == 0) {
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318 break;
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319 }
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320
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321 if (rb->buf->last < rb->buf->end) {
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322 break;
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323 }
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0
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324 }
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325
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326 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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286
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327 "http client request body rest %O", rb->rest);
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0
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328
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28
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329 if (rb->rest == 0) {
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0
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330 break;
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331 }
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332
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256
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333 if (!c->read->ready) {
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334 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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335 ngx_add_timer(c->read, clcf->client_body_timeout);
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0
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336
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430
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337 if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
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256
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338 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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339 }
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122
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340
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256
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341 return NGX_AGAIN;
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122
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342 }
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0
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343 }
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344
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122
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345 if (c->read->timer_set) {
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346 ngx_del_timer(c->read);
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347 }
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348
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182
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349 if (rb->temp_file || r->request_body_in_file_only) {
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0
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350
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351 /* save the last part */
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28
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352
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182
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353 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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354 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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355 }
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356
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50
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357 b = ngx_calloc_buf(r->pool);
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358 if (b == NULL) {
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0
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359 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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360 }
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361
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362 b->in_file = 1;
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363 b->file_pos = 0;
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28
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364 b->file_last = rb->temp_file->file.offset;
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365 b->file = &rb->temp_file->file;
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0
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366
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28
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367 if (rb->bufs->next) {
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368 rb->bufs->next->buf = b;
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0
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369
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370 } else {
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28
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371 rb->bufs->buf = b;
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0
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372 }
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373 }
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374
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182
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375 if (r->request_body_in_file_only && rb->bufs->next) {
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376 rb->bufs = rb->bufs->next;
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377 }
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378
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28
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379 rb->post_handler(r);
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0
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380
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381 return NGX_OK;
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382 }
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182
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383
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|
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384
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|
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385 static ngx_int_t
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386 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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|
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387 {
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388 ssize_t n;
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389 ngx_temp_file_t *tf;
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390 ngx_http_request_body_t *rb;
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391 ngx_http_core_loc_conf_t *clcf;
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392
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393 rb = r->request_body;
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394
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|
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395 if (rb->temp_file == NULL) {
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|
|
396 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
|
|
|
397 if (tf == NULL) {
|
|
|
398 return NGX_ERROR;
|
|
|
399 }
|
|
|
400
|
|
|
401 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
402
|
|
|
403 tf->file.fd = NGX_INVALID_FILE;
|
|
|
404 tf->file.log = r->connection->log;
|
|
|
405 tf->path = clcf->client_body_temp_path;
|
|
|
406 tf->pool = r->pool;
|
|
|
407 tf->warn = "a client request body is buffered to a temporary file";
|
|
186
|
408 tf->log_level = r->request_body_file_log_level;
|
|
182
|
409 tf->persistent = r->request_body_in_persistent_file;
|
|
278
|
410 tf->clean = r->request_body_in_clean_file;
|
|
182
|
411
|
|
|
412 if (r->request_body_file_group_access) {
|
|
276
|
413 tf->access = 0660;
|
|
182
|
414 }
|
|
|
415
|
|
|
416 rb->temp_file = tf;
|
|
|
417 }
|
|
|
418
|
|
|
419 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
|
|
|
420
|
|
|
421 /* TODO: n == 0 or not complete and level event */
|
|
|
422
|
|
|
423 if (n == NGX_ERROR) {
|
|
|
424 return NGX_ERROR;
|
|
|
425 }
|
|
|
426
|
|
|
427 rb->temp_file->offset += n;
|
|
|
428
|
|
|
429 return NGX_OK;
|
|
|
430 }
|
|
|
431
|
|
|
432
|
|
|
433 ngx_int_t
|
|
326
|
434 ngx_http_discard_request_body(ngx_http_request_t *r)
|
|
182
|
435 {
|
|
|
436 ssize_t size;
|
|
|
437 ngx_event_t *rev;
|
|
|
438
|
|
222
|
439 if (r != r->main || r->discard_body) {
|
|
182
|
440 return NGX_OK;
|
|
|
441 }
|
|
|
442
|
|
438
|
443 if (ngx_http_test_expect(r) != NGX_OK) {
|
|
|
444 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
445 }
|
|
|
446
|
|
182
|
447 rev = r->connection->read;
|
|
|
448
|
|
|
449 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
|
|
|
450
|
|
|
451 if (rev->timer_set) {
|
|
|
452 ngx_del_timer(rev);
|
|
|
453 }
|
|
|
454
|
|
342
|
455 if (r->headers_in.content_length_n <= 0 || r->request_body) {
|
|
182
|
456 return NGX_OK;
|
|
|
457 }
|
|
|
458
|
|
|
459 size = r->header_in->last - r->header_in->pos;
|
|
|
460
|
|
|
461 if (size) {
|
|
|
462 if (r->headers_in.content_length_n > size) {
|
|
|
463 r->headers_in.content_length_n -= size;
|
|
|
464
|
|
|
465 } else {
|
|
212
|
466 r->header_in->pos += (size_t) r->headers_in.content_length_n;
|
|
182
|
467 r->headers_in.content_length_n = 0;
|
|
|
468 return NGX_OK;
|
|
|
469 }
|
|
|
470 }
|
|
|
471
|
|
332
|
472 r->discard_body = 1;
|
|
|
473
|
|
326
|
474 r->read_event_handler = ngx_http_read_discarded_request_body_handler;
|
|
182
|
475
|
|
430
|
476 if (ngx_handle_read_event(rev, 0) != NGX_OK) {
|
|
182
|
477 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
478 }
|
|
|
479
|
|
326
|
480 (void) ngx_http_read_discarded_request_body(r);
|
|
|
481
|
|
|
482 return NGX_OK;
|
|
182
|
483 }
|
|
|
484
|
|
|
485
|
|
|
486 static void
|
|
326
|
487 ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r)
|
|
182
|
488 {
|
|
326
|
489 ngx_int_t rc;
|
|
|
490 ngx_msec_t timer;
|
|
|
491 ngx_event_t *rev;
|
|
|
492 ngx_connection_t *c;
|
|
|
493 ngx_http_core_loc_conf_t *clcf;
|
|
|
494
|
|
|
495 c = r->connection;
|
|
|
496 rev = c->read;
|
|
182
|
497
|
|
326
|
498 if (rev->timedout) {
|
|
|
499 c->timedout = 1;
|
|
|
500 c->error = 1;
|
|
|
501 ngx_http_finalize_request(r, 0);
|
|
|
502 return;
|
|
|
503 }
|
|
182
|
504
|
|
326
|
505 if (r->lingering_time) {
|
|
346
|
506 timer = (ngx_msec_t) (r->lingering_time - ngx_time());
|
|
326
|
507
|
|
|
508 if (timer <= 0) {
|
|
|
509 r->discard_body = 0;
|
|
|
510 ngx_http_finalize_request(r, 0);
|
|
182
|
511 return;
|
|
|
512 }
|
|
326
|
513
|
|
|
514 } else {
|
|
|
515 timer = 0;
|
|
|
516 }
|
|
|
517
|
|
|
518 rc = ngx_http_read_discarded_request_body(r);
|
|
|
519
|
|
|
520 if (rc == NGX_OK) {
|
|
|
521
|
|
|
522 r->discard_body = 0;
|
|
|
523
|
|
|
524 if (r->done) {
|
|
|
525 ngx_http_finalize_request(r, 0);
|
|
|
526 }
|
|
|
527
|
|
|
528 return;
|
|
182
|
529 }
|
|
|
530
|
|
326
|
531 /* rc == NGX_AGAIN */
|
|
|
532
|
|
430
|
533 if (ngx_handle_read_event(rev, 0) != NGX_OK) {
|
|
332
|
534 c->error = 1;
|
|
182
|
535 ngx_http_finalize_request(r, rc);
|
|
326
|
536 return;
|
|
|
537 }
|
|
|
538
|
|
|
539 if (timer) {
|
|
|
540
|
|
|
541 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
542
|
|
|
543 timer *= 1000;
|
|
|
544
|
|
|
545 if (timer > clcf->lingering_timeout) {
|
|
|
546 timer = clcf->lingering_timeout;
|
|
|
547 }
|
|
|
548
|
|
|
549 ngx_add_timer(rev, timer);
|
|
182
|
550 }
|
|
|
551 }
|
|
|
552
|
|
|
553
|
|
|
554 static ngx_int_t
|
|
326
|
555 ngx_http_read_discarded_request_body(ngx_http_request_t *r)
|
|
182
|
556 {
|
|
212
|
557 size_t size;
|
|
|
558 ssize_t n;
|
|
182
|
559 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
560
|
|
|
561 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
562 "http read discarded body");
|
|
|
563
|
|
326
|
564 do {
|
|
|
565 if (r->headers_in.content_length_n == 0) {
|
|
|
566 r->read_event_handler = ngx_http_block_reading;
|
|
|
567 return NGX_OK;
|
|
|
568 }
|
|
182
|
569
|
|
326
|
570 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ?
|
|
|
571 NGX_HTTP_DISCARD_BUFFER_SIZE:
|
|
|
572 (size_t) r->headers_in.content_length_n;
|
|
182
|
573
|
|
326
|
574 n = r->connection->recv(r->connection, buffer, size);
|
|
182
|
575
|
|
326
|
576 if (n == NGX_ERROR) {
|
|
|
577 r->connection->error = 1;
|
|
|
578 return NGX_OK;
|
|
|
579 }
|
|
182
|
580
|
|
326
|
581 if (n == NGX_AGAIN) {
|
|
|
582 return NGX_AGAIN;
|
|
|
583 }
|
|
182
|
584
|
|
330
|
585 if (n == 0) {
|
|
|
586 return NGX_OK;
|
|
|
587 }
|
|
|
588
|
|
326
|
589 r->headers_in.content_length_n -= n;
|
|
182
|
590
|
|
326
|
591 } while (r->connection->read->ready);
|
|
|
592
|
|
|
593 return NGX_AGAIN;
|
|
182
|
594 }
|
|
438
|
595
|
|
|
596
|
|
|
597 static ngx_int_t
|
|
|
598 ngx_http_test_expect(ngx_http_request_t *r)
|
|
|
599 {
|
|
|
600 ngx_int_t n;
|
|
|
601 ngx_str_t *expect;
|
|
|
602
|
|
|
603 if (r->expect_tested
|
|
|
604 || r->headers_in.expect == NULL
|
|
|
605 || r->http_version < NGX_HTTP_VERSION_11)
|
|
|
606 {
|
|
|
607 return NGX_OK;
|
|
|
608 }
|
|
|
609
|
|
|
610 r->expect_tested = 1;
|
|
|
611
|
|
|
612 expect = &r->headers_in.expect->value;
|
|
|
613
|
|
|
614 if (expect->len != sizeof("100-continue") - 1
|
|
|
615 || ngx_strncasecmp(expect->data, (u_char *) "100-continue",
|
|
|
616 sizeof("100-continue") - 1)
|
|
|
617 != 0)
|
|
|
618 {
|
|
|
619 return NGX_OK;
|
|
|
620 }
|
|
|
621
|
|
|
622 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
623 "send 100 Continue");
|
|
|
624
|
|
|
625 n = r->connection->send(r->connection,
|
|
|
626 (u_char *) "HTTP/1.1 100 Continue" CRLF CRLF,
|
|
|
627 sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1);
|
|
|
628
|
|
|
629 if (n == sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1) {
|
|
|
630 return NGX_OK;
|
|
|
631 }
|
|
|
632
|
|
|
633 /* we assume that such small packet should be send successfully */
|
|
|
634
|
|
|
635 return NGX_ERROR;
|
|
|
636 }
|
