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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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447
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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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86
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40 if (r->request_body || r->discard_body) {
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58
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41 post_handler(r);
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42 return NGX_OK;
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43 }
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44
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447
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45 if (ngx_http_test_expect(r) != NGX_OK) {
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46 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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47 }
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48
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50
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49 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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50 if (rb == NULL) {
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28
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51 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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52 }
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53
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54 r->request_body = rb;
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55
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238
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56 if (r->headers_in.content_length_n < 0) {
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57 post_handler(r);
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58 return NGX_OK;
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59 }
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60
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61 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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62
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63 if (r->headers_in.content_length_n == 0) {
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64
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65 if (r->request_body_in_file_only) {
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66 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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67 if (tf == NULL) {
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68 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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69 }
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70
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71 tf->file.fd = NGX_INVALID_FILE;
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72 tf->file.log = r->connection->log;
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73 tf->path = clcf->client_body_temp_path;
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74 tf->pool = r->pool;
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75 tf->warn = "a client request body is buffered to a temporary file";
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76 tf->log_level = r->request_body_file_log_level;
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77 tf->persistent = r->request_body_in_persistent_file;
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278
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78 tf->clean = r->request_body_in_clean_file;
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238
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79
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80 if (r->request_body_file_group_access) {
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276
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81 tf->access = 0660;
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238
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82 }
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83
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84 rb->temp_file = tf;
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85
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86 if (ngx_create_temp_file(&tf->file, tf->path, tf->pool,
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278
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87 tf->persistent, tf->clean, tf->access)
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238
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88 != NGX_OK)
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89 {
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90 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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91 }
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92 }
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93
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28
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94 post_handler(r);
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318
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95
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28
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96 return NGX_OK;
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97 }
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98
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99 rb->post_handler = post_handler;
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100
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101 /*
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102 * set by ngx_pcalloc():
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103 *
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104 * rb->bufs = NULL;
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105 * rb->buf = NULL;
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106 * rb->rest = 0;
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107 */
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108
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182
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109 preread = r->header_in->last - r->header_in->pos;
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0
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110
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182
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111 if (preread) {
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0
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112
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113 /* there is the pre-read part of the request body */
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114
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182
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115 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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116 "http client request body preread %uz", preread);
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117
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50
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118 b = ngx_calloc_buf(r->pool);
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119 if (b == NULL) {
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28
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120 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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121 }
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0
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122
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123 b->temporary = 1;
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182
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124 b->start = r->header_in->pos;
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125 b->pos = r->header_in->pos;
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126 b->last = r->header_in->last;
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127 b->end = r->header_in->end;
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0
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128
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50
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129 rb->bufs = ngx_alloc_chain_link(r->pool);
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130 if (rb->bufs == NULL) {
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28
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131 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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132 }
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133
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134 rb->bufs->buf = b;
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135 rb->bufs->next = NULL;
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0
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136
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216
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137 rb->buf = b;
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138
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214
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139 if ((off_t) preread >= r->headers_in.content_length_n) {
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0
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140
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141 /* the whole request body was pre-read */
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142
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212
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143 r->header_in->pos += (size_t) r->headers_in.content_length_n;
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24
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144 r->request_length += r->headers_in.content_length_n;
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0
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145
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182
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146 if (r->request_body_in_file_only) {
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147 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
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148 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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149 }
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150 }
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151
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28
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152 post_handler(r);
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0
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153
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154 return NGX_OK;
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155 }
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156
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182
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157 /*
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158 * to not consider the body as pipelined request in
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159 * ngx_http_set_keepalive()
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160 */
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0
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161 r->header_in->pos = r->header_in->last;
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182
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162
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163 r->request_length += preread;
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164
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165 rb->rest = r->headers_in.content_length_n - preread;
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166
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214
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167 if (rb->rest <= (off_t) (b->end - b->last)) {
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182
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168
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169 /* the whole request body may be placed in r->header_in */
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170
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276
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171 rb->to_write = rb->bufs;
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172
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182
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173 r->read_event_handler = ngx_http_read_client_request_body_handler;
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174
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175 return ngx_http_do_read_client_request_body(r);
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176 }
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177
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178 next = &rb->bufs->next;
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179
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180 } else {
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181 b = NULL;
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182 rb->rest = r->headers_in.content_length_n;
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183 next = &rb->bufs;
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0
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184 }
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185
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182
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186 size = clcf->client_body_buffer_size;
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187 size += size >> 2;
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0
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188
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212
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189 if (rb->rest < size) {
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190 size = (ssize_t) rb->rest;
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0
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191
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182
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192 if (r->request_body_in_single_buf) {
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193 size += preread;
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194 }
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195
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0
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196 } else {
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197 size = clcf->client_body_buffer_size;
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182
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198
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199 /* disable copying buffer for r->request_body_in_single_buf */
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200 b = NULL;
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0
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201 }
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202
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50
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203 rb->buf = ngx_create_temp_buf(r->pool, size);
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204 if (rb->buf == NULL) {
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28
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205 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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206 }
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0
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207
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50
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208 cl = ngx_alloc_chain_link(r->pool);
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209 if (cl == NULL) {
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28
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210 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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211 }
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0
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212
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28
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213 cl->buf = rb->buf;
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214 cl->next = NULL;
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215
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182
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216 if (b && r->request_body_in_single_buf) {
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217 size = b->last - b->pos;
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218 ngx_memcpy(rb->buf->pos, b->pos, size);
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219 rb->buf->last += size;
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220
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221 next = &rb->bufs;
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222 }
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223
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224 *next = cl;
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225
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226 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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227 rb->to_write = rb->bufs;
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0
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228
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229 } else {
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182
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230 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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231 }
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232
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58
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233 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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234
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58
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235 return ngx_http_do_read_client_request_body(r);
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0
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236 }
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237
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238
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50
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239 static void
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58
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240 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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241 {
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58
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242 ngx_int_t rc;
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0
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243
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58
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244 if (r->connection->read->timedout) {
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126
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245 r->connection->timedout = 1;
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278
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246 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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247 return;
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248 }
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249
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58
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250 rc = ngx_http_do_read_client_request_body(r);
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0
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251
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252 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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278
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253 ngx_http_finalize_request(r, rc);
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0
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254 }
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255 }
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256
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257
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50
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258 static ngx_int_t
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58
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259 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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260 {
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261 size_t size;
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262 ssize_t n;
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263 ngx_buf_t *b;
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58
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264 ngx_connection_t *c;
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28
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265 ngx_http_request_body_t *rb;
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0
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266 ngx_http_core_loc_conf_t *clcf;
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267
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58
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268 c = r->connection;
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28
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269 rb = r->request_body;
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0
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270
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271 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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272 "http read client request body");
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273
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274 for ( ;; ) {
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256
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275 for ( ;; ) {
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276 if (rb->buf->last == rb->buf->end) {
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277
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278 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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279 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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280 }
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28
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281
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256
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282 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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283 rb->buf->last = rb->buf->start;
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284 }
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285
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286 size = rb->buf->end - rb->buf->last;
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287
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288 if ((off_t) size > rb->rest) {
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289 size = (size_t) rb->rest;
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0
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290 }
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291
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256
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292 n = c->recv(c, rb->buf->last, size);
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293
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294 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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295 "http client request body recv %z", n);
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0
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296
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256
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297 if (n == NGX_AGAIN) {
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298 break;
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299 }
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300
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301 if (n == 0) {
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302 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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303 "client closed prematurely connection");
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304 }
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0
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305
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256
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306 if (n == 0 || n == NGX_ERROR) {
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307 c->error = 1;
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308 return NGX_HTTP_BAD_REQUEST;
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309 }
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310
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311 rb->buf->last += n;
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312 rb->rest -= n;
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313 r->request_length += n;
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314
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315 if (rb->rest == 0) {
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316 break;
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317 }
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318
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319 if (rb->buf->last < rb->buf->end) {
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320 break;
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321 }
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0
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322 }
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323
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324 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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286
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325 "http client request body rest %O", rb->rest);
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0
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326
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28
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327 if (rb->rest == 0) {
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0
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328 break;
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329 }
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330
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256
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331 if (!c->read->ready) {
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332 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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333 ngx_add_timer(c->read, clcf->client_body_timeout);
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0
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334
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439
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335 if (ngx_handle_read_event(c->read, 0) != NGX_OK) {
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256
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336 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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337 }
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122
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338
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256
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339 return NGX_AGAIN;
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122
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340 }
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0
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341 }
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342
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122
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343 if (c->read->timer_set) {
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344 ngx_del_timer(c->read);
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345 }
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346
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182
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347 if (rb->temp_file || r->request_body_in_file_only) {
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0
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348
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349 /* save the last part */
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28
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350
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182
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351 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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352 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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353 }
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354
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50
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355 b = ngx_calloc_buf(r->pool);
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356 if (b == NULL) {
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0
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357 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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358 }
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359
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360 b->in_file = 1;
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361 b->file_pos = 0;
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28
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362 b->file_last = rb->temp_file->file.offset;
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363 b->file = &rb->temp_file->file;
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0
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364
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28
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365 if (rb->bufs->next) {
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366 rb->bufs->next->buf = b;
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0
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367
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368 } else {
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28
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369 rb->bufs->buf = b;
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0
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370 }
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371 }
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372
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182
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373 if (r->request_body_in_file_only && rb->bufs->next) {
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374 rb->bufs = rb->bufs->next;
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375 }
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376
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28
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377 rb->post_handler(r);
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0
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378
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379 return NGX_OK;
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380 }
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|
182
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381
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382
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|
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383 static ngx_int_t
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384 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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|
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385 {
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386 ssize_t n;
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387 ngx_temp_file_t *tf;
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388 ngx_http_request_body_t *rb;
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389 ngx_http_core_loc_conf_t *clcf;
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390
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391 rb = r->request_body;
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392
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393 if (rb->temp_file == NULL) {
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394 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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|
|
395 if (tf == NULL) {
|
|
|
396 return NGX_ERROR;
|
|
|
397 }
|
|
|
398
|
|
|
399 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
400
|
|
|
401 tf->file.fd = NGX_INVALID_FILE;
|
|
|
402 tf->file.log = r->connection->log;
|
|
|
403 tf->path = clcf->client_body_temp_path;
|
|
|
404 tf->pool = r->pool;
|
|
|
405 tf->warn = "a client request body is buffered to a temporary file";
|
|
186
|
406 tf->log_level = r->request_body_file_log_level;
|
|
182
|
407 tf->persistent = r->request_body_in_persistent_file;
|
|
278
|
408 tf->clean = r->request_body_in_clean_file;
|
|
182
|
409
|
|
|
410 if (r->request_body_file_group_access) {
|
|
276
|
411 tf->access = 0660;
|
|
182
|
412 }
|
|
|
413
|
|
|
414 rb->temp_file = tf;
|
|
|
415 }
|
|
|
416
|
|
|
417 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
|
|
|
418
|
|
|
419 /* TODO: n == 0 or not complete and level event */
|
|
|
420
|
|
|
421 if (n == NGX_ERROR) {
|
|
|
422 return NGX_ERROR;
|
|
|
423 }
|
|
|
424
|
|
|
425 rb->temp_file->offset += n;
|
|
|
426
|
|
|
427 return NGX_OK;
|
|
|
428 }
|
|
|
429
|
|
|
430
|
|
|
431 ngx_int_t
|
|
326
|
432 ngx_http_discard_request_body(ngx_http_request_t *r)
|
|
182
|
433 {
|
|
|
434 ssize_t size;
|
|
|
435 ngx_event_t *rev;
|
|
|
436
|
|
222
|
437 if (r != r->main || r->discard_body) {
|
|
182
|
438 return NGX_OK;
|
|
|
439 }
|
|
|
440
|
|
447
|
441 if (ngx_http_test_expect(r) != NGX_OK) {
|
|
|
442 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
443 }
|
|
|
444
|
|
182
|
445 rev = r->connection->read;
|
|
|
446
|
|
|
447 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
|
|
|
448
|
|
|
449 if (rev->timer_set) {
|
|
|
450 ngx_del_timer(rev);
|
|
|
451 }
|
|
|
452
|
|
342
|
453 if (r->headers_in.content_length_n <= 0 || r->request_body) {
|
|
182
|
454 return NGX_OK;
|
|
|
455 }
|
|
|
456
|
|
|
457 size = r->header_in->last - r->header_in->pos;
|
|
|
458
|
|
|
459 if (size) {
|
|
|
460 if (r->headers_in.content_length_n > size) {
|
|
|
461 r->headers_in.content_length_n -= size;
|
|
|
462
|
|
|
463 } else {
|
|
212
|
464 r->header_in->pos += (size_t) r->headers_in.content_length_n;
|
|
182
|
465 r->headers_in.content_length_n = 0;
|
|
|
466 return NGX_OK;
|
|
|
467 }
|
|
|
468 }
|
|
|
469
|
|
332
|
470 r->discard_body = 1;
|
|
|
471
|
|
326
|
472 r->read_event_handler = ngx_http_read_discarded_request_body_handler;
|
|
182
|
473
|
|
439
|
474 if (ngx_handle_read_event(rev, 0) != NGX_OK) {
|
|
182
|
475 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
476 }
|
|
|
477
|
|
326
|
478 (void) ngx_http_read_discarded_request_body(r);
|
|
|
479
|
|
|
480 return NGX_OK;
|
|
182
|
481 }
|
|
|
482
|
|
|
483
|
|
|
484 static void
|
|
326
|
485 ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r)
|
|
182
|
486 {
|
|
326
|
487 ngx_int_t rc;
|
|
|
488 ngx_msec_t timer;
|
|
|
489 ngx_event_t *rev;
|
|
|
490 ngx_connection_t *c;
|
|
|
491 ngx_http_core_loc_conf_t *clcf;
|
|
|
492
|
|
|
493 c = r->connection;
|
|
|
494 rev = c->read;
|
|
182
|
495
|
|
326
|
496 if (rev->timedout) {
|
|
|
497 c->timedout = 1;
|
|
|
498 c->error = 1;
|
|
|
499 ngx_http_finalize_request(r, 0);
|
|
|
500 return;
|
|
|
501 }
|
|
182
|
502
|
|
326
|
503 if (r->lingering_time) {
|
|
346
|
504 timer = (ngx_msec_t) (r->lingering_time - ngx_time());
|
|
326
|
505
|
|
|
506 if (timer <= 0) {
|
|
|
507 r->discard_body = 0;
|
|
|
508 ngx_http_finalize_request(r, 0);
|
|
182
|
509 return;
|
|
|
510 }
|
|
326
|
511
|
|
|
512 } else {
|
|
|
513 timer = 0;
|
|
|
514 }
|
|
|
515
|
|
|
516 rc = ngx_http_read_discarded_request_body(r);
|
|
|
517
|
|
|
518 if (rc == NGX_OK) {
|
|
|
519
|
|
|
520 r->discard_body = 0;
|
|
|
521
|
|
|
522 if (r->done) {
|
|
|
523 ngx_http_finalize_request(r, 0);
|
|
|
524 }
|
|
|
525
|
|
|
526 return;
|
|
182
|
527 }
|
|
|
528
|
|
326
|
529 /* rc == NGX_AGAIN */
|
|
|
530
|
|
439
|
531 if (ngx_handle_read_event(rev, 0) != NGX_OK) {
|
|
332
|
532 c->error = 1;
|
|
182
|
533 ngx_http_finalize_request(r, rc);
|
|
326
|
534 return;
|
|
|
535 }
|
|
|
536
|
|
|
537 if (timer) {
|
|
|
538
|
|
|
539 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
540
|
|
|
541 timer *= 1000;
|
|
|
542
|
|
|
543 if (timer > clcf->lingering_timeout) {
|
|
|
544 timer = clcf->lingering_timeout;
|
|
|
545 }
|
|
|
546
|
|
|
547 ngx_add_timer(rev, timer);
|
|
182
|
548 }
|
|
|
549 }
|
|
|
550
|
|
|
551
|
|
|
552 static ngx_int_t
|
|
326
|
553 ngx_http_read_discarded_request_body(ngx_http_request_t *r)
|
|
182
|
554 {
|
|
212
|
555 size_t size;
|
|
|
556 ssize_t n;
|
|
182
|
557 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
558
|
|
|
559 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
560 "http read discarded body");
|
|
|
561
|
|
326
|
562 do {
|
|
|
563 if (r->headers_in.content_length_n == 0) {
|
|
|
564 r->read_event_handler = ngx_http_block_reading;
|
|
|
565 return NGX_OK;
|
|
|
566 }
|
|
182
|
567
|
|
326
|
568 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ?
|
|
|
569 NGX_HTTP_DISCARD_BUFFER_SIZE:
|
|
|
570 (size_t) r->headers_in.content_length_n;
|
|
182
|
571
|
|
326
|
572 n = r->connection->recv(r->connection, buffer, size);
|
|
182
|
573
|
|
326
|
574 if (n == NGX_ERROR) {
|
|
|
575 r->connection->error = 1;
|
|
|
576 return NGX_OK;
|
|
|
577 }
|
|
182
|
578
|
|
326
|
579 if (n == NGX_AGAIN) {
|
|
|
580 return NGX_AGAIN;
|
|
|
581 }
|
|
182
|
582
|
|
330
|
583 if (n == 0) {
|
|
|
584 return NGX_OK;
|
|
|
585 }
|
|
|
586
|
|
326
|
587 r->headers_in.content_length_n -= n;
|
|
182
|
588
|
|
326
|
589 } while (r->connection->read->ready);
|
|
|
590
|
|
|
591 return NGX_AGAIN;
|
|
182
|
592 }
|
|
447
|
593
|
|
|
594
|
|
|
595 static ngx_int_t
|
|
|
596 ngx_http_test_expect(ngx_http_request_t *r)
|
|
|
597 {
|
|
|
598 ngx_int_t n;
|
|
|
599 ngx_str_t *expect;
|
|
|
600
|
|
|
601 if (r->expect_tested
|
|
|
602 || r->headers_in.expect == NULL
|
|
|
603 || r->http_version < NGX_HTTP_VERSION_11)
|
|
|
604 {
|
|
|
605 return NGX_OK;
|
|
|
606 }
|
|
|
607
|
|
|
608 r->expect_tested = 1;
|
|
|
609
|
|
|
610 expect = &r->headers_in.expect->value;
|
|
|
611
|
|
|
612 if (expect->len != sizeof("100-continue") - 1
|
|
|
613 || ngx_strncasecmp(expect->data, (u_char *) "100-continue",
|
|
|
614 sizeof("100-continue") - 1)
|
|
|
615 != 0)
|
|
|
616 {
|
|
|
617 return NGX_OK;
|
|
|
618 }
|
|
|
619
|
|
|
620 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
621 "send 100 Continue");
|
|
|
622
|
|
|
623 n = r->connection->send(r->connection,
|
|
|
624 (u_char *) "HTTP/1.1 100 Continue" CRLF CRLF,
|
|
|
625 sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1);
|
|
|
626
|
|
|
627 if (n == sizeof("HTTP/1.1 100 Continue" CRLF CRLF) - 1) {
|
|
|
628 return NGX_OK;
|
|
|
629 }
|
|
|
630
|
|
|
631 /* we assume that such small packet should be send successfully */
|
|
|
632
|
|
|
633 return NGX_ERROR;
|
|
|
634 }
|
