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484
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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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488
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10
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11 #include <gd.h>
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484
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12
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13
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14 #define NGX_HTTP_IMAGE_OFF 0
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15 #define NGX_HTTP_IMAGE_TEST 1
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16 #define NGX_HTTP_IMAGE_SIZE 2
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17 #define NGX_HTTP_IMAGE_RESIZE 3
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18 #define NGX_HTTP_IMAGE_CROP 4
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19
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20
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21 #define NGX_HTTP_IMAGE_START 0
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22 #define NGX_HTTP_IMAGE_READ 1
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23 #define NGX_HTTP_IMAGE_PROCESS 2
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488
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24 #define NGX_HTTP_IMAGE_PASS 3
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25 #define NGX_HTTP_IMAGE_DONE 4
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484
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26
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27
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28 #define NGX_HTTP_IMAGE_NONE 0
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29 #define NGX_HTTP_IMAGE_JPEG 1
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30 #define NGX_HTTP_IMAGE_GIF 2
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31 #define NGX_HTTP_IMAGE_PNG 3
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32
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33
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34 #define NGX_HTTP_IMAGE_BUFFERED 0x08
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35
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36
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37 typedef struct {
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38 ngx_uint_t filter;
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39 ngx_uint_t width;
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40 ngx_uint_t height;
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492
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41 ngx_int_t jpeg_quality;
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42
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528
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43 ngx_flag_t transparency;
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44
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510
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45 ngx_http_complex_value_t *wcv;
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46 ngx_http_complex_value_t *hcv;
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47
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484
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48 size_t buffer_size;
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49 } ngx_http_image_filter_conf_t;
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50
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51
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52 typedef struct {
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53 u_char *image;
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54 u_char *last;
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55
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56 size_t length;
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57
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58 ngx_uint_t width;
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59 ngx_uint_t height;
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60
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510
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61 ngx_uint_t max_width;
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62 ngx_uint_t max_height;
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63
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484
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64 ngx_uint_t phase;
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65 ngx_uint_t type;
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66 ngx_uint_t force;
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484
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67 } ngx_http_image_filter_ctx_t;
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68
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69
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488
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70 static ngx_int_t ngx_http_image_send(ngx_http_request_t *r,
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71 ngx_http_image_filter_ctx_t *ctx, ngx_chain_t *in);
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484
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72 static ngx_uint_t ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in);
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73 static ngx_int_t ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in);
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74 static ngx_buf_t *ngx_http_image_process(ngx_http_request_t *r);
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75 static ngx_buf_t *ngx_http_image_json(ngx_http_request_t *r,
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76 ngx_http_image_filter_ctx_t *ctx);
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77 static ngx_buf_t *ngx_http_image_asis(ngx_http_request_t *r,
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78 ngx_http_image_filter_ctx_t *ctx);
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79 static void ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b);
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80 static ngx_int_t ngx_http_image_size(ngx_http_request_t *r,
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81 ngx_http_image_filter_ctx_t *ctx);
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82
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83 static ngx_buf_t *ngx_http_image_resize(ngx_http_request_t *r,
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84 ngx_http_image_filter_ctx_t *ctx);
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85 static gdImagePtr ngx_http_image_source(ngx_http_request_t *r,
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86 ngx_http_image_filter_ctx_t *ctx);
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87 static gdImagePtr ngx_http_image_new(ngx_http_request_t *r, int w, int h,
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88 int colors);
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89 static u_char *ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type,
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90 gdImagePtr img, int *size);
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91 static void ngx_http_image_cleanup(void *data);
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510
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92 static ngx_uint_t ngx_http_image_filter_get_value(ngx_http_request_t *r,
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93 ngx_http_complex_value_t *cv, ngx_uint_t v);
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94 static ngx_uint_t ngx_http_image_filter_value(ngx_str_t *value);
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484
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95
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96
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97 static void *ngx_http_image_filter_create_conf(ngx_conf_t *cf);
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98 static char *ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent,
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99 void *child);
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100 static char *ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd,
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101 void *conf);
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102 static ngx_int_t ngx_http_image_filter_init(ngx_conf_t *cf);
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103
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104
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105 static ngx_command_t ngx_http_image_filter_commands[] = {
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106
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107 { ngx_string("image_filter"),
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108 NGX_HTTP_LOC_CONF|NGX_CONF_TAKE13,
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109 ngx_http_image_filter,
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110 NGX_HTTP_LOC_CONF_OFFSET,
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111 0,
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112 NULL },
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113
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492
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114 { ngx_string("image_filter_jpeg_quality"),
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115 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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116 ngx_conf_set_num_slot,
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117 NGX_HTTP_LOC_CONF_OFFSET,
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118 offsetof(ngx_http_image_filter_conf_t, jpeg_quality),
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119 NULL },
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120
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528
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121 { ngx_string("image_filter_transparency"),
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122 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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123 ngx_conf_set_flag_slot,
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124 NGX_HTTP_LOC_CONF_OFFSET,
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125 offsetof(ngx_http_image_filter_conf_t, transparency),
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126 NULL },
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127
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484
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128 { ngx_string("image_filter_buffer"),
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129 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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130 ngx_conf_set_size_slot,
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131 NGX_HTTP_LOC_CONF_OFFSET,
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132 offsetof(ngx_http_image_filter_conf_t, buffer_size),
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133 NULL },
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134
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135 ngx_null_command
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136 };
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137
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138
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139 static ngx_http_module_t ngx_http_image_filter_module_ctx = {
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140 NULL, /* preconfiguration */
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141 ngx_http_image_filter_init, /* postconfiguration */
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142
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143 NULL, /* create main configuration */
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144 NULL, /* init main configuration */
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145
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146 NULL, /* create server configuration */
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147 NULL, /* merge server configuration */
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148
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149 ngx_http_image_filter_create_conf, /* create location configuration */
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150 ngx_http_image_filter_merge_conf /* merge location configuration */
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151 };
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152
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153
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154 ngx_module_t ngx_http_image_filter_module = {
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155 NGX_MODULE_V1,
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156 &ngx_http_image_filter_module_ctx, /* module context */
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157 ngx_http_image_filter_commands, /* module directives */
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158 NGX_HTTP_MODULE, /* module type */
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159 NULL, /* init master */
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160 NULL, /* init module */
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161 NULL, /* init process */
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162 NULL, /* init thread */
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163 NULL, /* exit thread */
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164 NULL, /* exit process */
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165 NULL, /* exit master */
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166 NGX_MODULE_V1_PADDING
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167 };
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168
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169
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170 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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171 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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172
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173
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174 static ngx_str_t ngx_http_image_types[] = {
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175 ngx_string("image/jpeg"),
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176 ngx_string("image/gif"),
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177 ngx_string("image/png")
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178 };
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179
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180
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181 static ngx_int_t
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182 ngx_http_image_header_filter(ngx_http_request_t *r)
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183 {
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184 off_t len;
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185 ngx_http_image_filter_ctx_t *ctx;
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186 ngx_http_image_filter_conf_t *conf;
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187
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188 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) {
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189 return ngx_http_next_header_filter(r);
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190 }
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191
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490
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192 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
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193
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194 if (ctx) {
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195 ngx_http_set_ctx(r, NULL, ngx_http_image_filter_module);
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196 return ngx_http_next_header_filter(r);
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197 }
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198
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484
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199 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
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200
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201 if (conf->filter == NGX_HTTP_IMAGE_OFF) {
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202 return ngx_http_next_header_filter(r);
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203 }
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204
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205 if (r->headers_out.content_type.len
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206 >= sizeof("multipart/x-mixed-replace") - 1
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207 && ngx_strncasecmp(r->headers_out.content_type.data,
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208 (u_char *) "multipart/x-mixed-replace",
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209 sizeof("multipart/x-mixed-replace") - 1)
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210 == 0)
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211 {
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212 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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213 "image filter: multipart/x-mixed-replace response");
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214
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215 return NGX_ERROR;
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216 }
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217
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218 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_image_filter_ctx_t));
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219 if (ctx == NULL) {
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220 return NGX_ERROR;
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221 }
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222
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223 ngx_http_set_ctx(r, ctx, ngx_http_image_filter_module);
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224
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225 len = r->headers_out.content_length_n;
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226
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486
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227 if (len != -1 && len > (off_t) conf->buffer_size) {
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228 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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229 "image filter: too big response: %O", len);
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230
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592
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231 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
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484
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232 }
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233
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234 if (len == -1) {
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235 ctx->length = conf->buffer_size;
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236
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237 } else {
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238 ctx->length = (size_t) len;
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239 }
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240
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241 if (r->headers_out.refresh) {
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242 r->headers_out.refresh->hash = 0;
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243 }
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244
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245 r->main_filter_need_in_memory = 1;
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246 r->allow_ranges = 0;
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247
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248 return NGX_OK;
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249 }
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250
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251
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252 static ngx_int_t
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253 ngx_http_image_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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254 {
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255 ngx_int_t rc;
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256 ngx_str_t *ct;
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257 ngx_chain_t out;
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258 ngx_http_image_filter_ctx_t *ctx;
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259 ngx_http_image_filter_conf_t *conf;
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260
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261 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "image filter");
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262
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263 if (in == NULL) {
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264 return ngx_http_next_body_filter(r, in);
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265 }
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266
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267 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
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268
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269 if (ctx == NULL) {
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270 return ngx_http_next_body_filter(r, in);
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271 }
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272
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273 switch (ctx->phase) {
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274
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275 case NGX_HTTP_IMAGE_START:
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276
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277 ctx->type = ngx_http_image_test(r, in);
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278
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279 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
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280
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281 if (ctx->type == NGX_HTTP_IMAGE_NONE) {
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282
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283 if (conf->filter == NGX_HTTP_IMAGE_SIZE) {
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284 out.buf = ngx_http_image_json(r, NULL);
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285
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286 if (out.buf) {
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287 out.next = NULL;
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488
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288 ctx->phase = NGX_HTTP_IMAGE_DONE;
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484
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289
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488
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290 return ngx_http_image_send(r, ctx, &out);
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484
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291 }
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292 }
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293
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294 return ngx_http_filter_finalize_request(r,
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488
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295 &ngx_http_image_filter_module,
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484
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296 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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297 }
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298
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299 /* override content type */
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300
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301 ct = &ngx_http_image_types[ctx->type - 1];
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302 r->headers_out.content_type_len = ct->len;
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303 r->headers_out.content_type = *ct;
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494
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304 r->headers_out.content_type_lowcase = NULL;
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484
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305
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306 if (conf->filter == NGX_HTTP_IMAGE_TEST) {
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488
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307 ctx->phase = NGX_HTTP_IMAGE_PASS;
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308
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309 return ngx_http_image_send(r, ctx, in);
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484
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310 }
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311
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312 ctx->phase = NGX_HTTP_IMAGE_READ;
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313
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314 /* fall through */
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315
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316 case NGX_HTTP_IMAGE_READ:
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317
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318 rc = ngx_http_image_read(r, in);
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319
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320 if (rc == NGX_AGAIN) {
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321 return NGX_OK;
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322 }
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323
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324 if (rc == NGX_ERROR) {
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325 return ngx_http_filter_finalize_request(r,
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488
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326 &ngx_http_image_filter_module,
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484
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327 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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328 }
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329
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330 /* fall through */
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331
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332 case NGX_HTTP_IMAGE_PROCESS:
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333
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334 out.buf = ngx_http_image_process(r);
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335
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336 if (out.buf == NULL) {
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337 return ngx_http_filter_finalize_request(r,
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488
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338 &ngx_http_image_filter_module,
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484
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339 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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340 }
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341
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342 out.next = NULL;
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488
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343 ctx->phase = NGX_HTTP_IMAGE_PASS;
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344
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345 return ngx_http_image_send(r, ctx, &out);
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484
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346
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488
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347 case NGX_HTTP_IMAGE_PASS:
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348
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349 return ngx_http_next_body_filter(r, in);
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484
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350
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351 default: /* NGX_HTTP_IMAGE_DONE */
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352
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488
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353 rc = ngx_http_next_body_filter(r, NULL);
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354
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355 /* NGX_ERROR resets any pending data */
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356 return (rc == NGX_OK) ? NGX_ERROR : rc;
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484
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357 }
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488
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358 }
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484
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359
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488
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360
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361 static ngx_int_t
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362 ngx_http_image_send(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx,
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363 ngx_chain_t *in)
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364 {
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365 ngx_int_t rc;
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484
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366
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367 rc = ngx_http_next_header_filter(r);
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368
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369 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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488
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370 return NGX_ERROR;
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484
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371 }
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372
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488
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373 rc = ngx_http_next_body_filter(r, in);
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374
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375 if (ctx->phase == NGX_HTTP_IMAGE_DONE) {
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376 /* NGX_ERROR resets any pending data */
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377 return (rc == NGX_OK) ? NGX_ERROR : rc;
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378 }
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379
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380 return rc;
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484
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381 }
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382
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383
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384 static ngx_uint_t
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385 ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
386 {
|
|
|
387 u_char *p;
|
|
|
388
|
|
|
389 p = in->buf->pos;
|
|
|
390
|
|
|
391 if (in->buf->last - p < 16) {
|
|
|
392 return NGX_HTTP_IMAGE_NONE;
|
|
|
393 }
|
|
|
394
|
|
|
395 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
396 "image filter: \"%c%c\"", p[0], p[1]);
|
|
|
397
|
|
|
398 if (p[0] == 0xff && p[1] == 0xd8) {
|
|
|
399
|
|
|
400 /* JPEG */
|
|
|
401
|
|
|
402 return NGX_HTTP_IMAGE_JPEG;
|
|
|
403
|
|
|
404 } else if (p[0] == 'G' && p[1] == 'I' && p[2] == 'F' && p[3] == '8'
|
|
498
|
405 && p[5] == 'a')
|
|
484
|
406 {
|
|
498
|
407 if (p[4] == '9' || p[4] == '7') {
|
|
|
408 /* GIF */
|
|
|
409 return NGX_HTTP_IMAGE_GIF;
|
|
|
410 }
|
|
484
|
411
|
|
|
412 } else if (p[0] == 0x89 && p[1] == 'P' && p[2] == 'N' && p[3] == 'G'
|
|
|
413 && p[4] == 0x0d && p[5] == 0x0a && p[6] == 0x1a && p[7] == 0x0a)
|
|
|
414 {
|
|
|
415 /* PNG */
|
|
|
416
|
|
|
417 return NGX_HTTP_IMAGE_PNG;
|
|
|
418 }
|
|
|
419
|
|
|
420 return NGX_HTTP_IMAGE_NONE;
|
|
|
421 }
|
|
|
422
|
|
|
423
|
|
|
424 static ngx_int_t
|
|
|
425 ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
426 {
|
|
|
427 u_char *p;
|
|
|
428 size_t size, rest;
|
|
|
429 ngx_buf_t *b;
|
|
|
430 ngx_chain_t *cl;
|
|
|
431 ngx_http_image_filter_ctx_t *ctx;
|
|
|
432
|
|
|
433 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
|
|
|
434
|
|
|
435 if (ctx->image == NULL) {
|
|
|
436 ctx->image = ngx_palloc(r->pool, ctx->length);
|
|
|
437 if (ctx->image == NULL) {
|
|
|
438 return NGX_ERROR;
|
|
|
439 }
|
|
|
440
|
|
|
441 ctx->last = ctx->image;
|
|
|
442 }
|
|
|
443
|
|
|
444 p = ctx->last;
|
|
|
445
|
|
|
446 for (cl = in; cl; cl = cl->next) {
|
|
|
447
|
|
|
448 b = cl->buf;
|
|
|
449 size = b->last - b->pos;
|
|
|
450
|
|
|
451 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
452 "image buf: %uz", size);
|
|
|
453
|
|
|
454 rest = ctx->image + ctx->length - p;
|
|
|
455 size = (rest < size) ? rest : size;
|
|
|
456
|
|
|
457 p = ngx_cpymem(p, b->pos, size);
|
|
|
458 b->pos += size;
|
|
|
459
|
|
|
460 if (b->last_buf) {
|
|
|
461 ctx->last = p;
|
|
|
462 return NGX_OK;
|
|
|
463 }
|
|
|
464 }
|
|
|
465
|
|
|
466 ctx->last = p;
|
|
|
467 r->connection->buffered |= NGX_HTTP_IMAGE_BUFFERED;
|
|
|
468
|
|
|
469 return NGX_AGAIN;
|
|
|
470 }
|
|
|
471
|
|
|
472
|
|
|
473 static ngx_buf_t *
|
|
|
474 ngx_http_image_process(ngx_http_request_t *r)
|
|
|
475 {
|
|
|
476 ngx_int_t rc;
|
|
|
477 ngx_http_image_filter_ctx_t *ctx;
|
|
|
478 ngx_http_image_filter_conf_t *conf;
|
|
|
479
|
|
|
480 r->connection->buffered &= ~NGX_HTTP_IMAGE_BUFFERED;
|
|
|
481
|
|
|
482 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
|
|
|
483
|
|
|
484 rc = ngx_http_image_size(r, ctx);
|
|
|
485
|
|
|
486 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
487
|
|
|
488 if (conf->filter == NGX_HTTP_IMAGE_SIZE) {
|
|
510
|
489 return ngx_http_image_json(r, rc == NGX_OK ? ctx : NULL);
|
|
|
490 }
|
|
484
|
491
|
|
510
|
492 ctx->max_width = ngx_http_image_filter_get_value(r, conf->wcv, conf->width);
|
|
|
493 if (ctx->max_width == 0) {
|
|
|
494 return NULL;
|
|
484
|
495 }
|
|
|
496
|
|
510
|
497 ctx->max_height = ngx_http_image_filter_get_value(r, conf->hcv,
|
|
|
498 conf->height);
|
|
|
499 if (ctx->max_height == 0) {
|
|
|
500 return NULL;
|
|
|
501 }
|
|
|
502
|
|
|
503 if (rc == NGX_OK
|
|
|
504 && ctx->width <= ctx->max_width
|
|
558
|
505 && ctx->height <= ctx->max_height
|
|
|
506 && !ctx->force)
|
|
510
|
507 {
|
|
|
508 return ngx_http_image_asis(r, ctx);
|
|
|
509 }
|
|
|
510
|
|
|
511 return ngx_http_image_resize(r, ctx);
|
|
484
|
512 }
|
|
|
513
|
|
|
514
|
|
|
515 static ngx_buf_t *
|
|
|
516 ngx_http_image_json(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
517 {
|
|
|
518 size_t len;
|
|
|
519 ngx_buf_t *b;
|
|
|
520
|
|
|
521 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
522 if (b == NULL) {
|
|
|
523 return NULL;
|
|
|
524 }
|
|
|
525
|
|
|
526 b->memory = 1;
|
|
|
527 b->last_buf = 1;
|
|
|
528
|
|
|
529 ngx_http_clean_header(r);
|
|
|
530
|
|
|
531 r->headers_out.status = NGX_HTTP_OK;
|
|
570
|
532 ngx_str_set(&r->headers_out.content_type, "text/plain");
|
|
494
|
533 r->headers_out.content_type_lowcase = NULL;
|
|
484
|
534
|
|
|
535 if (ctx == NULL) {
|
|
|
536 b->pos = (u_char *) "{}" CRLF;
|
|
|
537 b->last = b->pos + sizeof("{}" CRLF) - 1;
|
|
|
538
|
|
|
539 ngx_http_image_length(r, b);
|
|
|
540
|
|
|
541 return b;
|
|
|
542 }
|
|
|
543
|
|
|
544 len = sizeof("{ \"img\" : "
|
|
|
545 "{ \"width\": , \"height\": , \"type\": \"jpeg\" } }" CRLF) - 1
|
|
|
546 + 2 * NGX_SIZE_T_LEN;
|
|
|
547
|
|
|
548 b->pos = ngx_pnalloc(r->pool, len);
|
|
|
549 if (b->pos == NULL) {
|
|
|
550 return NULL;
|
|
|
551 }
|
|
|
552
|
|
|
553 b->last = ngx_sprintf(b->pos,
|
|
|
554 "{ \"img\" : "
|
|
|
555 "{ \"width\": %uz,"
|
|
|
556 " \"height\": %uz,"
|
|
|
557 " \"type\": \"%s\" } }" CRLF,
|
|
|
558 ctx->width, ctx->height,
|
|
|
559 ngx_http_image_types[ctx->type - 1].data + 6);
|
|
|
560
|
|
|
561 ngx_http_image_length(r, b);
|
|
|
562
|
|
|
563 return b;
|
|
|
564 }
|
|
|
565
|
|
|
566
|
|
|
567 static ngx_buf_t *
|
|
|
568 ngx_http_image_asis(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
569 {
|
|
|
570 ngx_buf_t *b;
|
|
|
571
|
|
|
572 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
573 if (b == NULL) {
|
|
|
574 return NULL;
|
|
|
575 }
|
|
|
576
|
|
|
577 b->pos = ctx->image;
|
|
|
578 b->last = ctx->last;
|
|
|
579 b->memory = 1;
|
|
|
580 b->last_buf = 1;
|
|
|
581
|
|
|
582 ngx_http_image_length(r, b);
|
|
|
583
|
|
|
584 return b;
|
|
|
585 }
|
|
|
586
|
|
|
587
|
|
|
588 static void
|
|
|
589 ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b)
|
|
|
590 {
|
|
|
591 r->headers_out.content_length_n = b->last - b->pos;
|
|
|
592
|
|
|
593 if (r->headers_out.content_length) {
|
|
|
594 r->headers_out.content_length->hash = 0;
|
|
|
595 }
|
|
|
596
|
|
|
597 r->headers_out.content_length = NULL;
|
|
|
598 }
|
|
|
599
|
|
|
600
|
|
|
601 static ngx_int_t
|
|
|
602 ngx_http_image_size(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
603 {
|
|
|
604 u_char *p, *last;
|
|
558
|
605 size_t len, app;
|
|
484
|
606 ngx_uint_t width, height;
|
|
|
607
|
|
|
608 p = ctx->image;
|
|
|
609
|
|
|
610 switch (ctx->type) {
|
|
|
611
|
|
|
612 case NGX_HTTP_IMAGE_JPEG:
|
|
|
613
|
|
|
614 p += 2;
|
|
|
615 last = ctx->image + ctx->length - 10;
|
|
558
|
616 width = 0;
|
|
|
617 height = 0;
|
|
|
618 app = 0;
|
|
484
|
619
|
|
|
620 while (p < last) {
|
|
|
621
|
|
|
622 if (p[0] == 0xff && p[1] != 0xff) {
|
|
|
623
|
|
|
624 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
558
|
625 "JPEG: %02xd %02xd", p[0], p[1]);
|
|
484
|
626
|
|
|
627 p++;
|
|
|
628
|
|
558
|
629 if ((*p == 0xc0 || *p == 0xc1 || *p == 0xc2 || *p == 0xc3
|
|
|
630 || *p == 0xc9 || *p == 0xca || *p == 0xcb)
|
|
|
631 && (width == 0 || height == 0))
|
|
484
|
632 {
|
|
558
|
633 width = p[6] * 256 + p[7];
|
|
|
634 height = p[4] * 256 + p[5];
|
|
484
|
635 }
|
|
|
636
|
|
|
637 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
638 "JPEG: %02xd %02xd", p[1], p[2]);
|
|
|
639
|
|
558
|
640 len = p[1] * 256 + p[2];
|
|
|
641
|
|
|
642 if (*p >= 0xe1 && *p <= 0xef) {
|
|
|
643 /* application data, e.g., EXIF, Adobe XMP, etc. */
|
|
|
644 app += len;
|
|
|
645 }
|
|
|
646
|
|
|
647 p += len;
|
|
484
|
648
|
|
|
649 continue;
|
|
|
650 }
|
|
|
651
|
|
|
652 p++;
|
|
|
653 }
|
|
|
654
|
|
558
|
655 if (width == 0 || height == 0) {
|
|
|
656 return NGX_DECLINED;
|
|
|
657 }
|
|
484
|
658
|
|
558
|
659 if (ctx->length / 20 < app) {
|
|
|
660 /* force conversion if application data consume more than 5% */
|
|
|
661 ctx->force = 1;
|
|
|
662 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
663 "app data size: %uz", app);
|
|
|
664 }
|
|
484
|
665
|
|
|
666 break;
|
|
|
667
|
|
|
668 case NGX_HTTP_IMAGE_GIF:
|
|
|
669
|
|
|
670 if (ctx->length < 10) {
|
|
|
671 return NGX_DECLINED;
|
|
|
672 }
|
|
|
673
|
|
|
674 width = p[7] * 256 + p[6];
|
|
|
675 height = p[9] * 256 + p[8];
|
|
|
676
|
|
|
677 break;
|
|
|
678
|
|
|
679 case NGX_HTTP_IMAGE_PNG:
|
|
|
680
|
|
|
681 if (ctx->length < 24) {
|
|
|
682 return NGX_DECLINED;
|
|
|
683 }
|
|
|
684
|
|
|
685 width = p[18] * 256 + p[19];
|
|
|
686 height = p[22] * 256 + p[23];
|
|
|
687
|
|
|
688 break;
|
|
|
689
|
|
|
690 default:
|
|
|
691
|
|
|
692 return NGX_DECLINED;
|
|
|
693 }
|
|
|
694
|
|
|
695 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
696 "image size: %d x %d", width, height);
|
|
|
697
|
|
|
698 ctx->width = width;
|
|
|
699 ctx->height = height;
|
|
|
700
|
|
|
701 return NGX_OK;
|
|
|
702 }
|
|
|
703
|
|
|
704
|
|
|
705 static ngx_buf_t *
|
|
|
706 ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
707 {
|
|
528
|
708 int sx, sy, dx, dy, ox, oy, size,
|
|
|
709 colors, palette, transparent,
|
|
|
710 red, green, blue;
|
|
484
|
711 u_char *out;
|
|
|
712 ngx_buf_t *b;
|
|
|
713 ngx_uint_t resize;
|
|
|
714 gdImagePtr src, dst;
|
|
|
715 ngx_pool_cleanup_t *cln;
|
|
|
716 ngx_http_image_filter_conf_t *conf;
|
|
|
717
|
|
|
718 src = ngx_http_image_source(r, ctx);
|
|
|
719
|
|
|
720 if (src == NULL) {
|
|
|
721 return NULL;
|
|
|
722 }
|
|
|
723
|
|
|
724 sx = gdImageSX(src);
|
|
|
725 sy = gdImageSY(src);
|
|
|
726
|
|
|
727 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
728
|
|
558
|
729 if (!ctx->force
|
|
|
730 && (ngx_uint_t) sx <= ctx->max_width
|
|
510
|
731 && (ngx_uint_t) sy <= ctx->max_height)
|
|
|
732 {
|
|
484
|
733 gdImageDestroy(src);
|
|
|
734 return ngx_http_image_asis(r, ctx);
|
|
|
735 }
|
|
|
736
|
|
|
737 colors = gdImageColorsTotal(src);
|
|
528
|
738
|
|
|
739 if (colors && conf->transparency) {
|
|
|
740 transparent = gdImageGetTransparent(src);
|
|
|
741
|
|
|
742 if (transparent != -1) {
|
|
|
743 palette = colors;
|
|
|
744 red = gdImageRed(src, transparent);
|
|
|
745 green = gdImageGreen(src, transparent);
|
|
|
746 blue = gdImageBlue(src, transparent);
|
|
484
|
747
|
|
528
|
748 goto transparent;
|
|
|
749 }
|
|
|
750 }
|
|
526
|
751
|
|
528
|
752 palette = 0;
|
|
|
753 transparent = -1;
|
|
|
754 red = 0;
|
|
|
755 green = 0;
|
|
|
756 blue = 0;
|
|
|
757
|
|
|
758 transparent:
|
|
|
759
|
|
|
760 gdImageColorTransparent(src, -1);
|
|
526
|
761
|
|
484
|
762 dx = sx;
|
|
|
763 dy = sy;
|
|
|
764
|
|
|
765 if (conf->filter == NGX_HTTP_IMAGE_RESIZE) {
|
|
|
766
|
|
510
|
767 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
768 dy = dy * ctx->max_width / dx;
|
|
484
|
769 dy = dy ? dy : 1;
|
|
510
|
770 dx = ctx->max_width;
|
|
484
|
771 }
|
|
|
772
|
|
510
|
773 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
774 dx = dx * ctx->max_height / dy;
|
|
484
|
775 dx = dx ? dx : 1;
|
|
510
|
776 dy = ctx->max_height;
|
|
484
|
777 }
|
|
|
778
|
|
|
779 resize = 1;
|
|
|
780
|
|
|
781 } else { /* NGX_HTTP_IMAGE_CROP */
|
|
|
782
|
|
|
783 resize = 0;
|
|
|
784
|
|
510
|
785 if ((ngx_uint_t) (dx * 100 / dy)
|
|
|
786 < ctx->max_width * 100 / ctx->max_height)
|
|
|
787 {
|
|
|
788 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
789 dy = dy * ctx->max_width / dx;
|
|
484
|
790 dy = dy ? dy : 1;
|
|
510
|
791 dx = ctx->max_width;
|
|
484
|
792 resize = 1;
|
|
|
793 }
|
|
|
794
|
|
|
795 } else {
|
|
510
|
796 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
797 dx = dx * ctx->max_height / dy;
|
|
484
|
798 dx = dx ? dx : 1;
|
|
510
|
799 dy = ctx->max_height;
|
|
484
|
800 resize = 1;
|
|
|
801 }
|
|
|
802 }
|
|
|
803 }
|
|
|
804
|
|
|
805 if (resize) {
|
|
528
|
806 dst = ngx_http_image_new(r, dx, dy, palette);
|
|
484
|
807 if (dst == NULL) {
|
|
|
808 gdImageDestroy(src);
|
|
|
809 return NULL;
|
|
|
810 }
|
|
|
811
|
|
528
|
812 if (colors == 0) {
|
|
|
813 gdImageSaveAlpha(dst, 1);
|
|
|
814 gdImageAlphaBlending(dst, 0);
|
|
|
815 }
|
|
|
816
|
|
484
|
817 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
|
|
|
818
|
|
528
|
819 if (colors) {
|
|
|
820 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
821 }
|
|
|
822
|
|
484
|
823 gdImageDestroy(src);
|
|
|
824
|
|
|
825 } else {
|
|
|
826 dst = src;
|
|
|
827 }
|
|
|
828
|
|
|
829 if (conf->filter == NGX_HTTP_IMAGE_CROP) {
|
|
|
830
|
|
|
831 src = dst;
|
|
|
832
|
|
510
|
833 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
834 ox = dx - ctx->max_width;
|
|
484
|
835
|
|
|
836 } else {
|
|
|
837 ox = 0;
|
|
|
838 }
|
|
|
839
|
|
510
|
840 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
841 oy = dy - ctx->max_height;
|
|
484
|
842
|
|
|
843 } else {
|
|
|
844 oy = 0;
|
|
|
845 }
|
|
|
846
|
|
|
847 if (ox || oy) {
|
|
|
848
|
|
|
849 dst = ngx_http_image_new(r, dx - ox, dy - oy, colors);
|
|
|
850
|
|
|
851 if (dst == NULL) {
|
|
|
852 gdImageDestroy(src);
|
|
|
853 return NULL;
|
|
|
854 }
|
|
|
855
|
|
|
856 ox /= 2;
|
|
|
857 oy /= 2;
|
|
|
858
|
|
|
859 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
860 "image crop: %d x %d @ %d x %d",
|
|
|
861 dx, dy, ox, oy);
|
|
|
862
|
|
528
|
863 if (colors == 0) {
|
|
|
864 gdImageSaveAlpha(dst, 1);
|
|
|
865 gdImageAlphaBlending(dst, 0);
|
|
|
866 }
|
|
|
867
|
|
484
|
868 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy);
|
|
|
869
|
|
528
|
870 if (colors) {
|
|
|
871 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
872 }
|
|
|
873
|
|
484
|
874 gdImageDestroy(src);
|
|
|
875 }
|
|
|
876 }
|
|
|
877
|
|
526
|
878 if (transparent != -1 && colors) {
|
|
|
879 gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue));
|
|
|
880 }
|
|
484
|
881
|
|
|
882 out = ngx_http_image_out(r, ctx->type, dst, &size);
|
|
|
883
|
|
|
884 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
885 "image: %d x %d %d", sx, sy, colors);
|
|
|
886
|
|
|
887 gdImageDestroy(dst);
|
|
|
888 ngx_pfree(r->pool, ctx->image);
|
|
|
889
|
|
|
890 if (out == NULL) {
|
|
|
891 return NULL;
|
|
|
892 }
|
|
|
893
|
|
|
894 cln = ngx_pool_cleanup_add(r->pool, 0);
|
|
|
895 if (cln == NULL) {
|
|
|
896 gdFree(out);
|
|
|
897 return NULL;
|
|
|
898 }
|
|
|
899
|
|
|
900 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
901 if (b == NULL) {
|
|
|
902 gdFree(out);
|
|
|
903 return NULL;
|
|
|
904 }
|
|
|
905
|
|
|
906 cln->handler = ngx_http_image_cleanup;
|
|
|
907 cln->data = out;
|
|
|
908
|
|
|
909 b->pos = out;
|
|
|
910 b->last = out + size;
|
|
|
911 b->memory = 1;
|
|
|
912 b->last_buf = 1;
|
|
|
913
|
|
|
914 ngx_http_image_length(r, b);
|
|
|
915
|
|
|
916 return b;
|
|
|
917 }
|
|
|
918
|
|
|
919
|
|
|
920 static gdImagePtr
|
|
|
921 ngx_http_image_source(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
922 {
|
|
|
923 char *failed;
|
|
|
924 gdImagePtr img;
|
|
|
925
|
|
|
926 img = NULL;
|
|
|
927
|
|
|
928 switch (ctx->type) {
|
|
|
929
|
|
|
930 case NGX_HTTP_IMAGE_JPEG:
|
|
|
931 img = gdImageCreateFromJpegPtr(ctx->length, ctx->image);
|
|
|
932 failed = "gdImageCreateFromJpegPtr() failed";
|
|
|
933 break;
|
|
|
934
|
|
|
935 case NGX_HTTP_IMAGE_GIF:
|
|
|
936 img = gdImageCreateFromGifPtr(ctx->length, ctx->image);
|
|
|
937 failed = "gdImageCreateFromGifPtr() failed";
|
|
|
938 break;
|
|
|
939
|
|
|
940 case NGX_HTTP_IMAGE_PNG:
|
|
|
941 img = gdImageCreateFromPngPtr(ctx->length, ctx->image);
|
|
|
942 failed = "gdImageCreateFromPngPtr() failed";
|
|
|
943 break;
|
|
|
944
|
|
|
945 default:
|
|
|
946 failed = "unknown image type";
|
|
|
947 break;
|
|
|
948 }
|
|
|
949
|
|
|
950 if (img == NULL) {
|
|
|
951 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
952 }
|
|
|
953
|
|
|
954 return img;
|
|
|
955 }
|
|
|
956
|
|
|
957
|
|
|
958 static gdImagePtr
|
|
|
959 ngx_http_image_new(ngx_http_request_t *r, int w, int h, int colors)
|
|
|
960 {
|
|
|
961 gdImagePtr img;
|
|
|
962
|
|
|
963 if (colors == 0) {
|
|
|
964 img = gdImageCreateTrueColor(w, h);
|
|
|
965
|
|
|
966 if (img == NULL) {
|
|
|
967 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
968 "gdImageCreateTrueColor() failed");
|
|
|
969 return NULL;
|
|
|
970 }
|
|
|
971
|
|
|
972 } else {
|
|
|
973 img = gdImageCreate(w, h);
|
|
|
974
|
|
|
975 if (img == NULL) {
|
|
|
976 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
977 "gdImageCreate() failed");
|
|
|
978 return NULL;
|
|
|
979 }
|
|
|
980 }
|
|
|
981
|
|
|
982 return img;
|
|
|
983 }
|
|
|
984
|
|
|
985
|
|
|
986 static u_char *
|
|
|
987 ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, gdImagePtr img,
|
|
|
988 int *size)
|
|
|
989 {
|
|
492
|
990 char *failed;
|
|
|
991 u_char *out;
|
|
|
992 ngx_http_image_filter_conf_t *conf;
|
|
484
|
993
|
|
|
994 out = NULL;
|
|
|
995
|
|
|
996 switch (type) {
|
|
|
997
|
|
|
998 case NGX_HTTP_IMAGE_JPEG:
|
|
492
|
999 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
1000 out = gdImageJpegPtr(img, size, conf->jpeg_quality);
|
|
484
|
1001 failed = "gdImageJpegPtr() failed";
|
|
|
1002 break;
|
|
|
1003
|
|
|
1004 case NGX_HTTP_IMAGE_GIF:
|
|
|
1005 out = gdImageGifPtr(img, size);
|
|
|
1006 failed = "gdImageGifPtr() failed";
|
|
|
1007 break;
|
|
|
1008
|
|
|
1009 case NGX_HTTP_IMAGE_PNG:
|
|
|
1010 out = gdImagePngPtr(img, size);
|
|
|
1011 failed = "gdImagePngPtr() failed";
|
|
|
1012 break;
|
|
|
1013
|
|
|
1014 default:
|
|
|
1015 failed = "unknown image type";
|
|
|
1016 break;
|
|
|
1017 }
|
|
|
1018
|
|
|
1019 if (out == NULL) {
|
|
|
1020 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
1021 }
|
|
|
1022
|
|
|
1023 return out;
|
|
|
1024 }
|
|
|
1025
|
|
|
1026
|
|
|
1027 static void
|
|
|
1028 ngx_http_image_cleanup(void *data)
|
|
|
1029 {
|
|
|
1030 gdFree(data);
|
|
|
1031 }
|
|
|
1032
|
|
|
1033
|
|
510
|
1034 static ngx_uint_t
|
|
|
1035 ngx_http_image_filter_get_value(ngx_http_request_t *r,
|
|
|
1036 ngx_http_complex_value_t *cv, ngx_uint_t v)
|
|
|
1037 {
|
|
|
1038 ngx_str_t val;
|
|
|
1039
|
|
|
1040 if (cv == NULL) {
|
|
|
1041 return v;
|
|
|
1042 }
|
|
|
1043
|
|
|
1044 if (ngx_http_complex_value(r, cv, &val) != NGX_OK) {
|
|
|
1045 return 0;
|
|
|
1046 }
|
|
|
1047
|
|
|
1048 return ngx_http_image_filter_value(&val);
|
|
|
1049 }
|
|
|
1050
|
|
|
1051
|
|
|
1052 static ngx_uint_t
|
|
|
1053 ngx_http_image_filter_value(ngx_str_t *value)
|
|
|
1054 {
|
|
|
1055 ngx_int_t n;
|
|
|
1056
|
|
|
1057 if (value->len == 1 && value->data[0] == '-') {
|
|
|
1058 return (ngx_uint_t) -1;
|
|
|
1059 }
|
|
|
1060
|
|
|
1061 n = ngx_atoi(value->data, value->len);
|
|
|
1062
|
|
|
1063 if (n > 0) {
|
|
|
1064 return (ngx_uint_t) n;
|
|
|
1065 }
|
|
|
1066
|
|
|
1067 return 0;
|
|
|
1068 }
|
|
|
1069
|
|
|
1070
|
|
484
|
1071 static void *
|
|
|
1072 ngx_http_image_filter_create_conf(ngx_conf_t *cf)
|
|
|
1073 {
|
|
|
1074 ngx_http_image_filter_conf_t *conf;
|
|
|
1075
|
|
|
1076 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t));
|
|
|
1077 if (conf == NULL) {
|
|
496
|
1078 return NULL;
|
|
484
|
1079 }
|
|
|
1080
|
|
|
1081 conf->filter = NGX_CONF_UNSET_UINT;
|
|
492
|
1082 conf->jpeg_quality = NGX_CONF_UNSET;
|
|
528
|
1083 conf->transparency = NGX_CONF_UNSET;
|
|
484
|
1084 conf->buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
1085
|
|
|
1086 return conf;
|
|
|
1087 }
|
|
|
1088
|
|
|
1089
|
|
|
1090 static char *
|
|
|
1091 ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1092 {
|
|
|
1093 ngx_http_image_filter_conf_t *prev = parent;
|
|
|
1094 ngx_http_image_filter_conf_t *conf = child;
|
|
|
1095
|
|
|
1096 if (conf->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1097
|
|
|
1098 if (prev->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1099 conf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1100
|
|
|
1101 } else {
|
|
|
1102 conf->filter = prev->filter;
|
|
|
1103 conf->width = prev->width;
|
|
|
1104 conf->height = prev->height;
|
|
510
|
1105 conf->wcv = prev->wcv;
|
|
|
1106 conf->hcv = prev->hcv;
|
|
484
|
1107 }
|
|
|
1108 }
|
|
|
1109
|
|
492
|
1110 /* 75 is libjpeg default quality */
|
|
|
1111 ngx_conf_merge_value(conf->jpeg_quality, prev->jpeg_quality, 75);
|
|
|
1112
|
|
528
|
1113 ngx_conf_merge_value(conf->transparency, prev->transparency, 1);
|
|
|
1114
|
|
484
|
1115 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
|
|
|
1116 1 * 1024 * 1024);
|
|
|
1117
|
|
|
1118 return NGX_CONF_OK;
|
|
|
1119 }
|
|
|
1120
|
|
|
1121
|
|
|
1122 static char *
|
|
|
1123 ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
1124 {
|
|
|
1125 ngx_http_image_filter_conf_t *imcf = conf;
|
|
|
1126
|
|
510
|
1127 ngx_str_t *value;
|
|
|
1128 ngx_int_t n;
|
|
|
1129 ngx_uint_t i;
|
|
|
1130 ngx_http_complex_value_t cv;
|
|
|
1131 ngx_http_compile_complex_value_t ccv;
|
|
484
|
1132
|
|
|
1133 value = cf->args->elts;
|
|
|
1134
|
|
|
1135 i = 1;
|
|
|
1136
|
|
|
1137 if (cf->args->nelts == 2) {
|
|
|
1138 if (ngx_strcmp(value[i].data, "off") == 0) {
|
|
|
1139 imcf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1140
|
|
|
1141 } else if (ngx_strcmp(value[i].data, "test") == 0) {
|
|
|
1142 imcf->filter = NGX_HTTP_IMAGE_TEST;
|
|
|
1143
|
|
|
1144 } else if (ngx_strcmp(value[i].data, "size") == 0) {
|
|
|
1145 imcf->filter = NGX_HTTP_IMAGE_SIZE;
|
|
|
1146
|
|
|
1147 } else {
|
|
|
1148 goto failed;
|
|
|
1149 }
|
|
|
1150
|
|
|
1151 return NGX_CONF_OK;
|
|
|
1152 }
|
|
|
1153
|
|
|
1154 if (ngx_strcmp(value[i].data, "resize") == 0) {
|
|
|
1155 imcf->filter = NGX_HTTP_IMAGE_RESIZE;
|
|
|
1156
|
|
|
1157 } else if (ngx_strcmp(value[i].data, "crop") == 0) {
|
|
|
1158 imcf->filter = NGX_HTTP_IMAGE_CROP;
|
|
|
1159
|
|
|
1160 } else {
|
|
|
1161 goto failed;
|
|
|
1162 }
|
|
|
1163
|
|
510
|
1164 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1165
|
|
|
1166 ccv.cf = cf;
|
|
|
1167 ccv.value = &value[++i];
|
|
|
1168 ccv.complex_value = &cv;
|
|
484
|
1169
|
|
510
|
1170 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1171 return NGX_CONF_ERROR;
|
|
|
1172 }
|
|
484
|
1173
|
|
510
|
1174 if (cv.lengths == NULL) {
|
|
|
1175 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1176
|
|
|
1177 if (n == 0) {
|
|
484
|
1178 goto failed;
|
|
|
1179 }
|
|
|
1180
|
|
|
1181 imcf->width = (ngx_uint_t) n;
|
|
510
|
1182
|
|
|
1183 } else {
|
|
|
1184 imcf->wcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1185 if (imcf->wcv == NULL) {
|
|
|
1186 return NGX_CONF_ERROR;
|
|
|
1187 }
|
|
|
1188
|
|
|
1189 *imcf->wcv = cv;
|
|
484
|
1190 }
|
|
|
1191
|
|
510
|
1192 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1193
|
|
|
1194 ccv.cf = cf;
|
|
|
1195 ccv.value = &value[++i];
|
|
|
1196 ccv.complex_value = &cv;
|
|
484
|
1197
|
|
510
|
1198 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1199 return NGX_CONF_ERROR;
|
|
|
1200 }
|
|
484
|
1201
|
|
510
|
1202 if (cv.lengths == NULL) {
|
|
|
1203 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1204
|
|
|
1205 if (n == 0) {
|
|
484
|
1206 goto failed;
|
|
|
1207 }
|
|
|
1208
|
|
|
1209 imcf->height = (ngx_uint_t) n;
|
|
510
|
1210
|
|
|
1211 } else {
|
|
|
1212 imcf->hcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1213 if (imcf->hcv == NULL) {
|
|
|
1214 return NGX_CONF_ERROR;
|
|
|
1215 }
|
|
|
1216
|
|
|
1217 *imcf->hcv = cv;
|
|
484
|
1218 }
|
|
|
1219
|
|
|
1220 return NGX_CONF_OK;
|
|
|
1221
|
|
|
1222 failed:
|
|
|
1223
|
|
|
1224 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"",
|
|
|
1225 &value[i]);
|
|
|
1226
|
|
|
1227 return NGX_CONF_ERROR;
|
|
|
1228 }
|
|
|
1229
|
|
|
1230
|
|
|
1231 static ngx_int_t
|
|
|
1232 ngx_http_image_filter_init(ngx_conf_t *cf)
|
|
|
1233 {
|
|
|
1234 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1235 ngx_http_top_header_filter = ngx_http_image_header_filter;
|
|
|
1236
|
|
|
1237 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1238 ngx_http_top_body_filter = ngx_http_image_body_filter;
|
|
|
1239
|
|
|
1240 return NGX_OK;
|
|
|
1241 }
|
