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0
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1
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2 /*
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3 * Copyright (C) Igor Sysoev
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4 */
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5
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6
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7 #include <ngx_config.h>
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8 #include <ngx_core.h>
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9 #include <ngx_event.h>
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10 #include <ngx_http.h>
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11
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12
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58
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13 static void ngx_http_read_client_request_body_handler(ngx_http_request_t *r);
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14 static ngx_int_t ngx_http_do_read_client_request_body(ngx_http_request_t *r);
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182
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15 static ngx_int_t ngx_http_write_request_body(ngx_http_request_t *r,
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16 ngx_chain_t *body);
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326
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17 static void ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r);
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18 static ngx_int_t ngx_http_read_discarded_request_body(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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50
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45 rb = ngx_pcalloc(r->pool, sizeof(ngx_http_request_body_t));
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46 if (rb == NULL) {
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28
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47 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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48 }
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49
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50 r->request_body = rb;
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51
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238
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52 if (r->headers_in.content_length_n < 0) {
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53 post_handler(r);
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54 return NGX_OK;
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55 }
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56
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57 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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58
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59 if (r->headers_in.content_length_n == 0) {
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60
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61 if (r->request_body_in_file_only) {
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62 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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63 if (tf == NULL) {
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64 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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65 }
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66
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67 tf->file.fd = NGX_INVALID_FILE;
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68 tf->file.log = r->connection->log;
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69 tf->path = clcf->client_body_temp_path;
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70 tf->pool = r->pool;
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71 tf->warn = "a client request body is buffered to a temporary file";
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72 tf->log_level = r->request_body_file_log_level;
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73 tf->persistent = r->request_body_in_persistent_file;
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278
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74 tf->clean = r->request_body_in_clean_file;
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238
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75
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76 if (r->request_body_file_group_access) {
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276
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77 tf->access = 0660;
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238
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78 }
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79
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80 rb->temp_file = tf;
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81
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82 if (ngx_create_temp_file(&tf->file, tf->path, tf->pool,
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278
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83 tf->persistent, tf->clean, tf->access)
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238
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84 != NGX_OK)
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85 {
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86 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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87 }
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88 }
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89
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28
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90 post_handler(r);
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318
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91
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28
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92 return NGX_OK;
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93 }
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94
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95 rb->post_handler = post_handler;
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96
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97 /*
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98 * set by ngx_pcalloc():
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99 *
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100 * rb->bufs = NULL;
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101 * rb->buf = NULL;
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102 * rb->rest = 0;
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103 */
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104
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182
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105 preread = r->header_in->last - r->header_in->pos;
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0
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106
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182
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107 if (preread) {
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0
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108
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109 /* there is the pre-read part of the request body */
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110
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182
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111 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
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112 "http client request body preread %uz", preread);
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113
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50
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114 b = ngx_calloc_buf(r->pool);
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115 if (b == NULL) {
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28
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116 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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117 }
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0
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118
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119 b->temporary = 1;
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182
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120 b->start = r->header_in->pos;
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121 b->pos = r->header_in->pos;
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122 b->last = r->header_in->last;
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123 b->end = r->header_in->end;
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0
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124
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50
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125 rb->bufs = ngx_alloc_chain_link(r->pool);
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126 if (rb->bufs == NULL) {
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28
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127 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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128 }
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129
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130 rb->bufs->buf = b;
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131 rb->bufs->next = NULL;
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0
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132
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216
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133 rb->buf = b;
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134
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214
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135 if ((off_t) preread >= r->headers_in.content_length_n) {
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0
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136
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137 /* the whole request body was pre-read */
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138
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212
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139 r->header_in->pos += (size_t) r->headers_in.content_length_n;
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24
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140 r->request_length += r->headers_in.content_length_n;
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0
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141
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182
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142 if (r->request_body_in_file_only) {
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143 if (ngx_http_write_request_body(r, rb->bufs) != NGX_OK) {
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144 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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145 }
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146 }
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147
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28
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148 post_handler(r);
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0
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149
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150 return NGX_OK;
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151 }
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152
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182
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153 /*
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154 * to not consider the body as pipelined request in
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155 * ngx_http_set_keepalive()
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156 */
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0
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157 r->header_in->pos = r->header_in->last;
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182
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158
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159 r->request_length += preread;
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160
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161 rb->rest = r->headers_in.content_length_n - preread;
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162
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214
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163 if (rb->rest <= (off_t) (b->end - b->last)) {
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182
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164
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165 /* the whole request body may be placed in r->header_in */
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166
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276
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167 rb->to_write = rb->bufs;
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168
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182
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169 r->read_event_handler = ngx_http_read_client_request_body_handler;
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170
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171 return ngx_http_do_read_client_request_body(r);
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172 }
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173
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174 next = &rb->bufs->next;
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175
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176 } else {
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177 b = NULL;
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178 rb->rest = r->headers_in.content_length_n;
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179 next = &rb->bufs;
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0
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180 }
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181
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182
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182 size = clcf->client_body_buffer_size;
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183 size += size >> 2;
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0
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184
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212
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185 if (rb->rest < size) {
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186 size = (ssize_t) rb->rest;
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0
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187
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182
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188 if (r->request_body_in_single_buf) {
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189 size += preread;
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190 }
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191
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0
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192 } else {
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193 size = clcf->client_body_buffer_size;
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182
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194
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195 /* disable copying buffer for r->request_body_in_single_buf */
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196 b = NULL;
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0
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197 }
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198
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50
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199 rb->buf = ngx_create_temp_buf(r->pool, size);
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200 if (rb->buf == NULL) {
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28
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201 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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202 }
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0
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203
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50
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204 cl = ngx_alloc_chain_link(r->pool);
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205 if (cl == NULL) {
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28
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206 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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207 }
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0
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208
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28
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209 cl->buf = rb->buf;
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210 cl->next = NULL;
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211
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182
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212 if (b && r->request_body_in_single_buf) {
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213 size = b->last - b->pos;
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214 ngx_memcpy(rb->buf->pos, b->pos, size);
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215 rb->buf->last += size;
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216
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217 next = &rb->bufs;
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218 }
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219
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220 *next = cl;
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221
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222 if (r->request_body_in_file_only || r->request_body_in_single_buf) {
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223 rb->to_write = rb->bufs;
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0
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224
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225 } else {
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182
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226 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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0
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227 }
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228
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58
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229 r->read_event_handler = ngx_http_read_client_request_body_handler;
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0
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230
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58
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231 return ngx_http_do_read_client_request_body(r);
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0
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232 }
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233
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234
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50
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235 static void
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58
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236 ngx_http_read_client_request_body_handler(ngx_http_request_t *r)
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0
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237 {
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58
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238 ngx_int_t rc;
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0
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239
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58
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240 if (r->connection->read->timedout) {
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126
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241 r->connection->timedout = 1;
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278
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242 ngx_http_finalize_request(r, NGX_HTTP_REQUEST_TIME_OUT);
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0
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243 return;
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244 }
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245
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58
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246 rc = ngx_http_do_read_client_request_body(r);
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0
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247
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248 if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
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278
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249 ngx_http_finalize_request(r, rc);
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0
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250 }
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251 }
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252
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253
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50
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254 static ngx_int_t
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58
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255 ngx_http_do_read_client_request_body(ngx_http_request_t *r)
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0
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256 {
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257 size_t size;
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258 ssize_t n;
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259 ngx_buf_t *b;
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58
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260 ngx_connection_t *c;
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28
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261 ngx_http_request_body_t *rb;
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0
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262 ngx_http_core_loc_conf_t *clcf;
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263
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58
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264 c = r->connection;
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28
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265 rb = r->request_body;
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0
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266
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267 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, c->log, 0,
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268 "http read client request body");
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269
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270 for ( ;; ) {
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256
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271 for ( ;; ) {
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272 if (rb->buf->last == rb->buf->end) {
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273
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274 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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275 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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276 }
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28
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277
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256
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278 rb->to_write = rb->bufs->next ? rb->bufs->next : rb->bufs;
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279 rb->buf->last = rb->buf->start;
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280 }
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281
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282 size = rb->buf->end - rb->buf->last;
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283
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284 if ((off_t) size > rb->rest) {
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285 size = (size_t) rb->rest;
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0
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286 }
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287
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256
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288 n = c->recv(c, rb->buf->last, size);
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289
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290 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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291 "http client request body recv %z", n);
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0
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292
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256
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293 if (n == NGX_AGAIN) {
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294 break;
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295 }
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296
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297 if (n == 0) {
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298 ngx_log_error(NGX_LOG_INFO, c->log, 0,
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299 "client closed prematurely connection");
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300 }
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0
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301
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256
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302 if (n == 0 || n == NGX_ERROR) {
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303 c->error = 1;
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304 return NGX_HTTP_BAD_REQUEST;
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305 }
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306
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307 rb->buf->last += n;
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308 rb->rest -= n;
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309 r->request_length += n;
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310
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311 if (rb->rest == 0) {
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312 break;
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313 }
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314
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315 if (rb->buf->last < rb->buf->end) {
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316 break;
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317 }
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0
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318 }
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319
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320 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, c->log, 0,
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286
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321 "http client request body rest %O", rb->rest);
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0
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322
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28
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323 if (rb->rest == 0) {
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0
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324 break;
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325 }
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326
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256
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327 if (!c->read->ready) {
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328 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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329 ngx_add_timer(c->read, clcf->client_body_timeout);
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0
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330
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256
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331 if (ngx_handle_read_event(c->read, 0) == NGX_ERROR) {
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332 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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333 }
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122
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334
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256
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335 return NGX_AGAIN;
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122
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336 }
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0
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337 }
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338
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122
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339 if (c->read->timer_set) {
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340 ngx_del_timer(c->read);
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341 }
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342
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182
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343 if (rb->temp_file || r->request_body_in_file_only) {
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0
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344
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345 /* save the last part */
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28
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346
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182
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347 if (ngx_http_write_request_body(r, rb->to_write) != NGX_OK) {
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0
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348 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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349 }
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350
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50
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351 b = ngx_calloc_buf(r->pool);
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352 if (b == NULL) {
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0
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353 return NGX_HTTP_INTERNAL_SERVER_ERROR;
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354 }
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355
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356 b->in_file = 1;
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357 b->file_pos = 0;
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28
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358 b->file_last = rb->temp_file->file.offset;
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359 b->file = &rb->temp_file->file;
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0
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360
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28
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361 if (rb->bufs->next) {
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362 rb->bufs->next->buf = b;
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0
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363
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364 } else {
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28
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365 rb->bufs->buf = b;
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0
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366 }
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367 }
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368
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182
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369 if (r->request_body_in_file_only && rb->bufs->next) {
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370 rb->bufs = rb->bufs->next;
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371 }
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372
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28
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373 rb->post_handler(r);
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0
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374
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375 return NGX_OK;
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376 }
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182
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377
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378
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|
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379 static ngx_int_t
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380 ngx_http_write_request_body(ngx_http_request_t *r, ngx_chain_t *body)
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381 {
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382 ssize_t n;
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383 ngx_temp_file_t *tf;
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384 ngx_http_request_body_t *rb;
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385 ngx_http_core_loc_conf_t *clcf;
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386
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387 rb = r->request_body;
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388
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389 if (rb->temp_file == NULL) {
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390 tf = ngx_pcalloc(r->pool, sizeof(ngx_temp_file_t));
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391 if (tf == NULL) {
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392 return NGX_ERROR;
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393 }
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394
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395 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
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396
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|
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397 tf->file.fd = NGX_INVALID_FILE;
|
|
|
398 tf->file.log = r->connection->log;
|
|
|
399 tf->path = clcf->client_body_temp_path;
|
|
|
400 tf->pool = r->pool;
|
|
|
401 tf->warn = "a client request body is buffered to a temporary file";
|
|
186
|
402 tf->log_level = r->request_body_file_log_level;
|
|
182
|
403 tf->persistent = r->request_body_in_persistent_file;
|
|
278
|
404 tf->clean = r->request_body_in_clean_file;
|
|
182
|
405
|
|
|
406 if (r->request_body_file_group_access) {
|
|
276
|
407 tf->access = 0660;
|
|
182
|
408 }
|
|
|
409
|
|
|
410 rb->temp_file = tf;
|
|
|
411 }
|
|
|
412
|
|
|
413 n = ngx_write_chain_to_temp_file(rb->temp_file, body);
|
|
|
414
|
|
|
415 /* TODO: n == 0 or not complete and level event */
|
|
|
416
|
|
|
417 if (n == NGX_ERROR) {
|
|
|
418 return NGX_ERROR;
|
|
|
419 }
|
|
|
420
|
|
|
421 rb->temp_file->offset += n;
|
|
|
422
|
|
|
423 return NGX_OK;
|
|
|
424 }
|
|
|
425
|
|
|
426
|
|
|
427 ngx_int_t
|
|
326
|
428 ngx_http_discard_request_body(ngx_http_request_t *r)
|
|
182
|
429 {
|
|
|
430 ssize_t size;
|
|
|
431 ngx_event_t *rev;
|
|
|
432
|
|
222
|
433 if (r != r->main || r->discard_body) {
|
|
182
|
434 return NGX_OK;
|
|
|
435 }
|
|
|
436
|
|
|
437 rev = r->connection->read;
|
|
|
438
|
|
|
439 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, rev->log, 0, "http set discard body");
|
|
|
440
|
|
|
441 if (rev->timer_set) {
|
|
|
442 ngx_del_timer(rev);
|
|
|
443 }
|
|
|
444
|
|
|
445 if (r->headers_in.content_length_n <= 0) {
|
|
|
446 return NGX_OK;
|
|
|
447 }
|
|
|
448
|
|
|
449 size = r->header_in->last - r->header_in->pos;
|
|
|
450
|
|
|
451 if (size) {
|
|
|
452 if (r->headers_in.content_length_n > size) {
|
|
|
453 r->headers_in.content_length_n -= size;
|
|
|
454
|
|
|
455 } else {
|
|
212
|
456 r->header_in->pos += (size_t) r->headers_in.content_length_n;
|
|
182
|
457 r->headers_in.content_length_n = 0;
|
|
|
458 return NGX_OK;
|
|
|
459 }
|
|
|
460 }
|
|
|
461
|
|
332
|
462 r->discard_body = 1;
|
|
|
463
|
|
326
|
464 r->read_event_handler = ngx_http_read_discarded_request_body_handler;
|
|
182
|
465
|
|
|
466 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
|
467 return NGX_HTTP_INTERNAL_SERVER_ERROR;
|
|
|
468 }
|
|
|
469
|
|
326
|
470 (void) ngx_http_read_discarded_request_body(r);
|
|
|
471
|
|
|
472 return NGX_OK;
|
|
182
|
473 }
|
|
|
474
|
|
|
475
|
|
|
476 static void
|
|
326
|
477 ngx_http_read_discarded_request_body_handler(ngx_http_request_t *r)
|
|
182
|
478 {
|
|
326
|
479 ngx_int_t rc;
|
|
|
480 ngx_msec_t timer;
|
|
|
481 ngx_event_t *rev;
|
|
|
482 ngx_connection_t *c;
|
|
|
483 ngx_http_core_loc_conf_t *clcf;
|
|
|
484
|
|
|
485 c = r->connection;
|
|
|
486 rev = c->read;
|
|
182
|
487
|
|
326
|
488 if (rev->timedout) {
|
|
|
489 c->timedout = 1;
|
|
|
490 c->error = 1;
|
|
|
491 ngx_http_finalize_request(r, 0);
|
|
|
492 return;
|
|
|
493 }
|
|
182
|
494
|
|
326
|
495 if (r->lingering_time) {
|
|
|
496 timer = r->lingering_time - ngx_time();
|
|
|
497
|
|
|
498 if (timer <= 0) {
|
|
|
499 r->discard_body = 0;
|
|
|
500 ngx_http_finalize_request(r, 0);
|
|
182
|
501 return;
|
|
|
502 }
|
|
326
|
503
|
|
|
504 } else {
|
|
|
505 timer = 0;
|
|
|
506 }
|
|
|
507
|
|
|
508 rc = ngx_http_read_discarded_request_body(r);
|
|
|
509
|
|
|
510 if (rc == NGX_OK) {
|
|
|
511
|
|
|
512 r->discard_body = 0;
|
|
|
513
|
|
|
514 if (r->done) {
|
|
|
515 ngx_http_finalize_request(r, 0);
|
|
|
516 }
|
|
|
517
|
|
|
518 return;
|
|
182
|
519 }
|
|
|
520
|
|
326
|
521 /* rc == NGX_AGAIN */
|
|
|
522
|
|
|
523 if (ngx_handle_read_event(rev, 0) == NGX_ERROR) {
|
|
332
|
524 c->error = 1;
|
|
182
|
525 ngx_http_finalize_request(r, rc);
|
|
326
|
526 return;
|
|
|
527 }
|
|
|
528
|
|
|
529 if (timer) {
|
|
|
530
|
|
|
531 clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
|
|
|
532
|
|
|
533 timer *= 1000;
|
|
|
534
|
|
|
535 if (timer > clcf->lingering_timeout) {
|
|
|
536 timer = clcf->lingering_timeout;
|
|
|
537 }
|
|
|
538
|
|
|
539 ngx_add_timer(rev, timer);
|
|
182
|
540 }
|
|
|
541 }
|
|
|
542
|
|
|
543
|
|
|
544 static ngx_int_t
|
|
326
|
545 ngx_http_read_discarded_request_body(ngx_http_request_t *r)
|
|
182
|
546 {
|
|
212
|
547 size_t size;
|
|
|
548 ssize_t n;
|
|
182
|
549 u_char buffer[NGX_HTTP_DISCARD_BUFFER_SIZE];
|
|
|
550
|
|
|
551 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
552 "http read discarded body");
|
|
|
553
|
|
326
|
554 do {
|
|
|
555 if (r->headers_in.content_length_n == 0) {
|
|
|
556 r->read_event_handler = ngx_http_block_reading;
|
|
|
557 return NGX_OK;
|
|
|
558 }
|
|
182
|
559
|
|
326
|
560 size = (r->headers_in.content_length_n > NGX_HTTP_DISCARD_BUFFER_SIZE) ?
|
|
|
561 NGX_HTTP_DISCARD_BUFFER_SIZE:
|
|
|
562 (size_t) r->headers_in.content_length_n;
|
|
182
|
563
|
|
326
|
564 n = r->connection->recv(r->connection, buffer, size);
|
|
182
|
565
|
|
326
|
566 if (n == NGX_ERROR) {
|
|
|
567 r->connection->error = 1;
|
|
|
568 return NGX_OK;
|
|
|
569 }
|
|
182
|
570
|
|
326
|
571 if (n == NGX_AGAIN) {
|
|
|
572 return NGX_AGAIN;
|
|
|
573 }
|
|
182
|
574
|
|
330
|
575 if (n == 0) {
|
|
|
576 return NGX_OK;
|
|
|
577 }
|
|
|
578
|
|
326
|
579 r->headers_in.content_length_n -= n;
|
|
182
|
580
|
|
326
|
581 } while (r->connection->read->ready);
|
|
|
582
|
|
|
583 return NGX_AGAIN;
|
|
182
|
584 }
|
