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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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660
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4 * Copyright (C) Nginx, Inc.
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0
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5 */
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6
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7
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8 #include <ngx_config.h>
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9 #include <ngx_core.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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326
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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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634
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147 b->last = r->header_in->pos;
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0
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148
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182
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149 if (r->request_body_in_file_only) {
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150 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
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151 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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152 }
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153 }
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154
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28
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155 post_handler(r);
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0
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156
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157 return NGX_OK;
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158 }
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159
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182
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160 /*
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161 * to not consider the body as pipelined request in
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162 * ngx_http_set_keepalive()
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163 */
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0
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164 r->header_in->pos = r->header_in->last;
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182
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165
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166 r->request_length += preread;
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167
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168 rb->rest = r->headers_in.content_length_n - preread;
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169
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214
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170 if (rb->rest <= (off_t) (b->end - b->last)) {
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182
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171
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172 /* the whole request body may be placed in r->header_in */
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173
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276
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174 rb->to_write = rb->bufs;
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175
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182
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176 r->read_event_handler = ngx_http_read_client_request_body_handler;
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177
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178 return ngx_http_do_read_client_request_body(r);
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179 }
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180
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181 next = &rb->bufs->next;
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182
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183 } else {
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184 b = NULL;
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185 rb->rest = r->headers_in.content_length_n;
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186 next = &rb->bufs;
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0
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187 }
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188
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182
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189 size = clcf->client_body_buffer_size;
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190 size += size >> 2;
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0
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191
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212
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192 if (rb->rest < size) {
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193 size = (ssize_t) rb->rest;
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0
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194
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182
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195 if (r->request_body_in_single_buf) {
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196 size += preread;
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197 }
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198
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0
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199 } else {
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200 size = clcf->client_body_buffer_size;
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182
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201
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202 /* disable copying buffer for r->request_body_in_single_buf */
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203 b = NULL;
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0
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204 }
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205
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50
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206 rb->buf = ngx_create_temp_buf(r->pool, size);
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207 if (rb->buf == NULL) {
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28
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208 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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209 }
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0
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210
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50
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211 cl = ngx_alloc_chain_link(r->pool);
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212 if (cl == NULL) {
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28
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213 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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214 }
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0
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215
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28
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216 cl->buf = rb->buf;
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217 cl->next = NULL;
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218
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182
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219 if (b && r->request_body_in_single_buf) {
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220 size = b->last - b->pos;
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221 ngx_memcpy(rb->buf->pos, b->pos, size);
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222 rb->buf->last += size;
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223
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224 next = &rb->bufs;
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225 }
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226
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227 *next = cl;
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228
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229 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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230 rb->to_write = rb->bufs;
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0
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231
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232 } else {
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182
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233 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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234 }
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235
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58
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236 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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237
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58
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238 return ngx_http_do_read_client_request_body(r);
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0
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239 }
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240
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241
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50
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242 static void
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58
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243 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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244 {
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58
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245 ngx_int_t rc;
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0
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246
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58
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247 if (r->connection->read->timedout) {
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126
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248 r->connection->timedout = 1;
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278
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249 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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250 return;
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251 }
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252
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58
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253 rc = ngx_http_do_read_client_request_body(r);
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0
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254
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255 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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278
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256 ngx_http_finalize_request(r, rc);
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0
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257 }
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258 }
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259
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260
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50
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261 static ngx_int_t
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58
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262 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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263 {
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264 size_t size;
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265 ssize_t n;
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266 ngx_buf_t *b;
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58
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267 ngx_connection_t *c;
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28
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268 ngx_http_request_body_t *rb;
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0
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269 ngx_http_core_loc_conf_t *clcf;
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270
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58
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271 c = r->connection;
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28
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272 rb = r->request_body;
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0
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273
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274 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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275 "http read client request body");
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276
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277 for ( ;; ) {
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256
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278 for ( ;; ) {
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279 if (rb->buf->last == rb->buf->end) {
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280
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281 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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282 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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283 }
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28
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284
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256
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285 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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286 rb->buf->last = rb->buf->start;
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287 }
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288
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289 size = rb->buf->end - rb->buf->last;
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290
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291 if ((off_t) size > rb->rest) {
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292 size = (size_t) rb->rest;
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0
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293 }
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294
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256
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295 n = c->recv(c, rb->buf->last, size);
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296
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297 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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298 "http client request body recv %z", n);
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0
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299
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256
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300 if (n == NGX_AGAIN) {
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301 break;
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302 }
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303
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304 if (n == 0) {
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305 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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672
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306 "client prematurely closed connection");
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256
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307 }
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0
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308
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256
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309 if (n == 0 || n == NGX_ERROR) {
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310 c->error = 1;
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311 return NGX_HTTP_BAD_REQUEST;
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312 }
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313
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314 rb->buf->last += n;
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315 rb->rest -= n;
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316 r->request_length += n;
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317
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318 if (rb->rest == 0) {
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319 break;
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320 }
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321
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322 if (rb->buf->last < rb->buf->end) {
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323 break;
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324 }
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0
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325 }
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326
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327 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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286
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328 "http client request body rest %O", rb->rest);
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0
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329
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28
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330 if (rb->rest == 0) {
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0
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331 break;
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332 }
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333
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256
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334 if (!c->read->ready) {
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335 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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336 ngx_add_timer(c->read, clcf->client_body_timeout);
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0
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337
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430
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338 if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
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256
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339 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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340 }
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122
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341
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256
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342 return NGX_AGAIN;
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122
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343 }
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0
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344 }
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345
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122
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346 if (c->read->timer_set) {
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347 ngx_del_timer(c->read);
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348 }
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349
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182
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350 if (rb->temp_file || r->request_body_in_file_only) {
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0
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351
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352 /* save the last part */
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28
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353
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182
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354 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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355 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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356 }
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357
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50
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358 b = ngx_calloc_buf(r->pool);
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359 if (b == NULL) {
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0
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360 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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361 }
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362
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363 b->in_file = 1;
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364 b->file_pos = 0;
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28
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365 b->file_last = rb->temp_file->file.offset;
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366 b->file = &rb->temp_file->file;
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0
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367
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28
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368 if (rb->bufs->next) {
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369 rb->bufs->next->buf = b;
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0
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370
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|
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371 } else {
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28
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372 rb->bufs->buf = b;
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0
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373 }
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374 }
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375
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634
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376 if (rb->bufs->next
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377 && (r->request_body_in_file_only || r->request_body_in_single_buf))
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378 {
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182
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379 rb->bufs = rb->bufs->next;
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380 }
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381
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636
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382 r->read_event_handler = ngx_http_block_reading;
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383
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28
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384 rb->post_handler(r);
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0
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385
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386 return NGX_OK;
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|
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387 }
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|
182
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388
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|
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389
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|
|
390 static ngx_int_t
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|
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391 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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|
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392 {
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|
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393 ssize_t n;
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394 ngx_temp_file_t *tf;
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|
|
395 ngx_http_request_body_t *rb;
|
|
|
396 ngx_http_core_loc_conf_t *clcf;
|
|
|
397
|
|
|
398 rb = r->request_body;
|
|
|
399
|
|
|
400 if (rb->temp_file == NULL) {
|
|
|
401 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
|
|
|
402 if (tf == NULL) {
|
|
|
403 return NGX_ERROR;
|
|
|
404 }
|
|
|
405
|
|
|
406 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
407
|
|
|
408 tf->file.fd = NGX_INVALID_FILE;
|
|
|
409 tf->file.log = r->connection->log;
|
|
|
410 tf->path = clcf->client_body_temp_path;
|
|
|
411 tf->pool = r->pool;
|
|
|
412 tf->warn = "a client request body is buffered to a temporary file";
|
|
186
|
413 tf->log_level = r->request_body_file_log_level;
|
|
182
|
414 tf->persistent = r->request_body_in_persistent_file;
|
|
278
|
415 tf->clean = r->request_body_in_clean_file;
|
|
182
|
416
|
|
|
417 if (r->request_body_file_group_access) {
|
|
276
|
418 tf->access = 0660;
|
|
182
|
419 }
|
|
|
420
|
|
|
421 rb->temp_file = tf;
|
|
|
422 }
|
|
|
423
|
|
|
424 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
|
|
|
425
|
|
|
426 /* TODO: n == 0 or not complete and level event */
|
|
|
427
|
|
|
428 if (n == NGX_ERROR) {
|
|
|
429 return NGX_ERROR;
|
|
|
430 }
|
|
|
431
|
|
|
432 rb->temp_file->offset += n;
|
|
|
433
|
|
|
434 return NGX_OK;
|
|
|
435 }
|
|
|
436
|
|
|
437
|
|
|
438 ngx_int_t
|
|
326
|
439 ngx_http_discard_request_body(ngx_http_request_t *r)
|
|
182
|
440 {
|
|
|
441 ssize_t size;
|
|
|
442 ngx_event_t *rev;
|
|
|
443
|
|
222
|
444 if (r != r->main || r->discard_body) {
|
|
182
|
445 return NGX_OK;
|
|
|
446 }
|
|
|
447
|
|
438
|
448 if (ngx_http_test_expect(r) != NGX_OK) {
|
|
|
449 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
450 }
|
|
|
451
|
|
182
|
452 rev = r->connection->read;
|
|
|
453
|
|
|
454 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
|
|
|
455
|
|
|
456 if (rev->timer_set) {
|
|
|
457 ngx_del_timer(rev);
|
|
|
458 }
|
|
|
459
|
|
342
|
460 if (r->headers_in.content_length_n <= 0 || r->request_body) {
|
|
182
|
461 return NGX_OK;
|
|
|
462 }
|
|
|
463
|
|
|
464 size = r->header_in->last - r->header_in->pos;
|
|
|
465
|
|
|
466 if (size) {
|
|
|
467 if (r->headers_in.content_length_n > size) {
|
|
538
|
468 r->header_in->pos += size;
|
|
182
|
469 r->headers_in.content_length_n -= size;
|
|
|
470
|
|
|
471 } else {
|
|
212
|
472 r->header_in->pos += (size_t) r->headers_in.content_length_n;
|
|
182
|
473 r->headers_in.content_length_n = 0;
|
|
|
474 return NGX_OK;
|
|
|
475 }
|
|
|
476 }
|
|
|
477
|
|
538
|
478 r->read_event_handler = ngx_http_discarded_request_body_handler;
|
|
182
|
479
|
|
430
|
480 if (ngx_handle_read_event(rev, 0) != NGX_OK) {
|
|
182
|
481 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
482 }
|
|
|
483
|
|
532
|
484 if (ngx_http_read_discarded_request_body(r) == NGX_OK) {
|
|
|
485 r->lingering_close = 0;
|
|
|
486
|
|
|
487 } else {
|
|
530
|
488 r->count++;
|
|
532
|
489 r->discard_body = 1;
|
|
530
|
490 }
|
|
326
|
491
|
|
|
492 return NGX_OK;
|
|
182
|
493 }
|
|
|
494
|
|
|
495
|
|
538
|
496 void
|
|
|
497 ngx_http_discarded_request_body_handler(ngx_http_request_t *r)
|
|
182
|
498 {
|
|
326
|
499 ngx_int_t rc;
|
|
|
500 ngx_msec_t timer;
|
|
|
501 ngx_event_t *rev;
|
|
|
502 ngx_connection_t *c;
|
|
|
503 ngx_http_core_loc_conf_t *clcf;
|
|
|
504
|
|
|
505 c = r->connection;
|
|
|
506 rev = c->read;
|
|
182
|
507
|
|
326
|
508 if (rev->timedout) {
|
|
|
509 c->timedout = 1;
|
|
|
510 c->error = 1;
|
|
538
|
511 ngx_http_finalize_request(r, NGX_ERROR);
|
|
326
|
512 return;
|
|
|
513 }
|
|
182
|
514
|
|
326
|
515 if (r->lingering_time) {
|
|
346
|
516 timer = (ngx_msec_t) (r->lingering_time - ngx_time());
|
|
326
|
517
|
|
|
518 if (timer <= 0) {
|
|
|
519 r->discard_body = 0;
|
|
532
|
520 r->lingering_close = 0;
|
|
538
|
521 ngx_http_finalize_request(r, NGX_ERROR);
|
|
182
|
522 return;
|
|
|
523 }
|
|
326
|
524
|
|
|
525 } else {
|
|
|
526 timer = 0;
|
|
|
527 }
|
|
|
528
|
|
|
529 rc = ngx_http_read_discarded_request_body(r);
|
|
|
530
|
|
|
531 if (rc == NGX_OK) {
|
|
|
532 r->discard_body = 0;
|
|
532
|
533 r->lingering_close = 0;
|
|
538
|
534 ngx_http_finalize_request(r, NGX_DONE);
|
|
326
|
535 return;
|
|
182
|
536 }
|
|
|
537
|
|
326
|
538 /* rc == NGX_AGAIN */
|
|
|
539
|
|
430
|
540 if (ngx_handle_read_event(rev, 0) != NGX_OK) {
|
|
332
|
541 c->error = 1;
|
|
538
|
542 ngx_http_finalize_request(r, NGX_ERROR);
|
|
326
|
543 return;
|
|
|
544 }
|
|
|
545
|
|
|
546 if (timer) {
|
|
|
547
|
|
|
548 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
549
|
|
|
550 timer *= 1000;
|
|
|
551
|
|
|
552 if (timer > clcf->lingering_timeout) {
|
|
|
553 timer = clcf->lingering_timeout;
|
|
|
554 }
|
|
|
555
|
|
|
556 ngx_add_timer(rev, timer);
|
|
182
|
557 }
|
|
|
558 }
|
|
|
559
|
|
|
560
|
|
|
561 static ngx_int_t
|
|
326
|
562 ngx_http_read_discarded_request_body(ngx_http_request_t *r)
|
|
182
|
563 {
|
|
212
|
564 size_t size;
|
|
|
565 ssize_t n;
|
|
182
|
566 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
567
|
|
|
568 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
569 "http read discarded body");
|
|
|
570
|
|
530
|
571 for ( ;; ) {
|
|
326
|
572 if (r->headers_in.content_length_n == 0) {
|
|
|
573 r->read_event_handler = ngx_http_block_reading;
|
|
|
574 return NGX_OK;
|
|
|
575 }
|
|
182
|
576
|
|
530
|
577 if (!r->connection->read->ready) {
|
|
|
578 return NGX_AGAIN;
|
|
|
579 }
|
|
|
580
|
|
326
|
581 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ?
|
|
|
582 NGX_HTTP_DISCARD_BUFFER_SIZE:
|
|
|
583 (size_t) r->headers_in.content_length_n;
|
|
182
|
584
|
|
326
|
585 n = r->connection->recv(r->connection, buffer, size);
|
|
182
|
586
|
|
326
|
587 if (n == NGX_ERROR) {
|
|
|
588 r->connection->error = 1;
|
|
|
589 return NGX_OK;
|
|
|
590 }
|
|
182
|
591
|
|
326
|
592 if (n == NGX_AGAIN) {
|
|
|
593 return NGX_AGAIN;
|
|
|
594 }
|
|
182
|
595
|
|
330
|
596 if (n == 0) {
|
|
|
597 return NGX_OK;
|
|
|
598 }
|
|
|
599
|
|
326
|
600 r->headers_in.content_length_n -= n;
|
|
530
|
601 }
|
|
182
|
602 }
|
|
438
|
603
|
|
|
604
|
|
|
605 static ngx_int_t
|
|
|
606 ngx_http_test_expect(ngx_http_request_t *r)
|
|
|
607 {
|
|
|
608 ngx_int_t n;
|
|
|
609 ngx_str_t *expect;
|
|
|
610
|
|
|
611 if (r->expect_tested
|
|
|
612 || r->headers_in.expect == NULL
|
|
|
613 || r->http_version < NGX_HTTP_VERSION_11)
|
|
|
614 {
|
|
|
615 return NGX_OK;
|
|
|
616 }
|
|
|
617
|
|
|
618 r->expect_tested = 1;
|
|
|
619
|
|
|
620 expect = &r->headers_in.expect->value;
|
|
|
621
|
|
|
622 if (expect->len != sizeof("100-continue") - 1
|
|
|
623 || ngx_strncasecmp(expect->data, (u_char *) "100-continue",
|
|
|
624 sizeof("100-continue") - 1)
|
|
|
625 != 0)
|
|
|
626 {
|
|
|
627 return NGX_OK;
|
|
|
628 }
|
|
|
629
|
|
|
630 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
631 "send 100 Continue");
|
|
|
632
|
|
|
633 n = r->connection->send(r->connection,
|
|
|
634 (u_char *) "HTTP/1.1 100 Continue" CRLF CRLF,
|
|
|
635 sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1);
|
|
|
636
|
|
|
637 if (n == sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1) {
|
|
|
638 return NGX_OK;
|
|
|
639 }
|
|
|
640
|
|
|
641 /* we assume that such small packet should be send successfully */
|
|
|
642
|
|
|
643 return NGX_ERROR;
|
|
|
644 }
|
