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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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484
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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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558
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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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484
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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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231 return NGX_ERROR;
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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)
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386 {
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|
|
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;
|
|
|
532 r->headers_out.content_type.len = sizeof("text/plain") - 1;
|
|
|
533 r->headers_out.content_type.data = (u_char *) "text/plain";
|
|
494
|
534 r->headers_out.content_type_lowcase = NULL;
|
|
484
|
535
|
|
|
536 if (ctx == NULL) {
|
|
|
537 b->pos = (u_char *) "{}" CRLF;
|
|
|
538 b->last = b->pos + sizeof("{}" CRLF) - 1;
|
|
|
539
|
|
|
540 ngx_http_image_length(r, b);
|
|
|
541
|
|
|
542 return b;
|
|
|
543 }
|
|
|
544
|
|
|
545 len = sizeof("{ \"img\" : "
|
|
|
546 "{ \"width\": , \"height\": , \"type\": \"jpeg\" } }" CRLF) - 1
|
|
|
547 + 2 * NGX_SIZE_T_LEN;
|
|
|
548
|
|
|
549 b->pos = ngx_pnalloc(r->pool, len);
|
|
|
550 if (b->pos == NULL) {
|
|
|
551 return NULL;
|
|
|
552 }
|
|
|
553
|
|
|
554 b->last = ngx_sprintf(b->pos,
|
|
|
555 "{ \"img\" : "
|
|
|
556 "{ \"width\": %uz,"
|
|
|
557 " \"height\": %uz,"
|
|
|
558 " \"type\": \"%s\" } }" CRLF,
|
|
|
559 ctx->width, ctx->height,
|
|
|
560 ngx_http_image_types[ctx->type - 1].data + 6);
|
|
|
561
|
|
|
562 ngx_http_image_length(r, b);
|
|
|
563
|
|
|
564 return b;
|
|
|
565 }
|
|
|
566
|
|
|
567
|
|
|
568 static ngx_buf_t *
|
|
|
569 ngx_http_image_asis(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
570 {
|
|
|
571 ngx_buf_t *b;
|
|
|
572
|
|
|
573 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
574 if (b == NULL) {
|
|
|
575 return NULL;
|
|
|
576 }
|
|
|
577
|
|
|
578 b->pos = ctx->image;
|
|
|
579 b->last = ctx->last;
|
|
|
580 b->memory = 1;
|
|
|
581 b->last_buf = 1;
|
|
|
582
|
|
|
583 ngx_http_image_length(r, b);
|
|
|
584
|
|
|
585 return b;
|
|
|
586 }
|
|
|
587
|
|
|
588
|
|
|
589 static void
|
|
|
590 ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b)
|
|
|
591 {
|
|
|
592 r->headers_out.content_length_n = b->last - b->pos;
|
|
|
593
|
|
|
594 if (r->headers_out.content_length) {
|
|
|
595 r->headers_out.content_length->hash = 0;
|
|
|
596 }
|
|
|
597
|
|
|
598 r->headers_out.content_length = NULL;
|
|
|
599 }
|
|
|
600
|
|
|
601
|
|
|
602 static ngx_int_t
|
|
|
603 ngx_http_image_size(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
604 {
|
|
|
605 u_char *p, *last;
|
|
558
|
606 size_t len, app;
|
|
484
|
607 ngx_uint_t width, height;
|
|
|
608
|
|
|
609 p = ctx->image;
|
|
|
610
|
|
|
611 switch (ctx->type) {
|
|
|
612
|
|
|
613 case NGX_HTTP_IMAGE_JPEG:
|
|
|
614
|
|
|
615 p += 2;
|
|
|
616 last = ctx->image + ctx->length - 10;
|
|
558
|
617 width = 0;
|
|
|
618 height = 0;
|
|
|
619 app = 0;
|
|
484
|
620
|
|
|
621 while (p < last) {
|
|
|
622
|
|
|
623 if (p[0] == 0xff && p[1] != 0xff) {
|
|
|
624
|
|
|
625 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
558
|
626 "JPEG: %02xd %02xd", p[0], p[1]);
|
|
484
|
627
|
|
|
628 p++;
|
|
|
629
|
|
558
|
630 if ((*p == 0xc0 || *p == 0xc1 || *p == 0xc2 || *p == 0xc3
|
|
|
631 || *p == 0xc9 || *p == 0xca || *p == 0xcb)
|
|
|
632 && (width == 0 || height == 0))
|
|
484
|
633 {
|
|
558
|
634 width = p[6] * 256 + p[7];
|
|
|
635 height = p[4] * 256 + p[5];
|
|
484
|
636 }
|
|
|
637
|
|
|
638 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
639 "JPEG: %02xd %02xd", p[1], p[2]);
|
|
|
640
|
|
558
|
641 len = p[1] * 256 + p[2];
|
|
|
642
|
|
|
643 if (*p >= 0xe1 && *p <= 0xef) {
|
|
|
644 /* application data, e.g., EXIF, Adobe XMP, etc. */
|
|
|
645 app += len;
|
|
|
646 }
|
|
|
647
|
|
|
648 p += len;
|
|
484
|
649
|
|
|
650 continue;
|
|
|
651 }
|
|
|
652
|
|
|
653 p++;
|
|
|
654 }
|
|
|
655
|
|
558
|
656 if (width == 0 || height == 0) {
|
|
|
657 return NGX_DECLINED;
|
|
|
658 }
|
|
484
|
659
|
|
558
|
660 if (ctx->length / 20 < app) {
|
|
|
661 /* force conversion if application data consume more than 5% */
|
|
|
662 ctx->force = 1;
|
|
|
663 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
664 "app data size: %uz", app);
|
|
|
665 }
|
|
484
|
666
|
|
|
667 break;
|
|
|
668
|
|
|
669 case NGX_HTTP_IMAGE_GIF:
|
|
|
670
|
|
|
671 if (ctx->length < 10) {
|
|
|
672 return NGX_DECLINED;
|
|
|
673 }
|
|
|
674
|
|
|
675 width = p[7] * 256 + p[6];
|
|
|
676 height = p[9] * 256 + p[8];
|
|
|
677
|
|
|
678 break;
|
|
|
679
|
|
|
680 case NGX_HTTP_IMAGE_PNG:
|
|
|
681
|
|
|
682 if (ctx->length < 24) {
|
|
|
683 return NGX_DECLINED;
|
|
|
684 }
|
|
|
685
|
|
|
686 width = p[18] * 256 + p[19];
|
|
|
687 height = p[22] * 256 + p[23];
|
|
|
688
|
|
|
689 break;
|
|
|
690
|
|
|
691 default:
|
|
|
692
|
|
|
693 return NGX_DECLINED;
|
|
|
694 }
|
|
|
695
|
|
|
696 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
697 "image size: %d x %d", width, height);
|
|
|
698
|
|
|
699 ctx->width = width;
|
|
|
700 ctx->height = height;
|
|
|
701
|
|
|
702 return NGX_OK;
|
|
|
703 }
|
|
|
704
|
|
|
705
|
|
|
706 static ngx_buf_t *
|
|
|
707 ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
708 {
|
|
528
|
709 int sx, sy, dx, dy, ox, oy, size,
|
|
|
710 colors, palette, transparent,
|
|
|
711 red, green, blue;
|
|
484
|
712 u_char *out;
|
|
|
713 ngx_buf_t *b;
|
|
|
714 ngx_uint_t resize;
|
|
|
715 gdImagePtr src, dst;
|
|
|
716 ngx_pool_cleanup_t *cln;
|
|
|
717 ngx_http_image_filter_conf_t *conf;
|
|
|
718
|
|
|
719 src = ngx_http_image_source(r, ctx);
|
|
|
720
|
|
|
721 if (src == NULL) {
|
|
|
722 return NULL;
|
|
|
723 }
|
|
|
724
|
|
|
725 sx = gdImageSX(src);
|
|
|
726 sy = gdImageSY(src);
|
|
|
727
|
|
|
728 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
729
|
|
558
|
730 if (!ctx->force
|
|
|
731 && (ngx_uint_t) sx <= ctx->max_width
|
|
510
|
732 && (ngx_uint_t) sy <= ctx->max_height)
|
|
|
733 {
|
|
484
|
734 gdImageDestroy(src);
|
|
|
735 return ngx_http_image_asis(r, ctx);
|
|
|
736 }
|
|
|
737
|
|
|
738 colors = gdImageColorsTotal(src);
|
|
528
|
739
|
|
|
740 if (colors && conf->transparency) {
|
|
|
741 transparent = gdImageGetTransparent(src);
|
|
|
742
|
|
|
743 if (transparent != -1) {
|
|
|
744 palette = colors;
|
|
|
745 red = gdImageRed(src, transparent);
|
|
|
746 green = gdImageGreen(src, transparent);
|
|
|
747 blue = gdImageBlue(src, transparent);
|
|
484
|
748
|
|
528
|
749 goto transparent;
|
|
|
750 }
|
|
|
751 }
|
|
526
|
752
|
|
528
|
753 palette = 0;
|
|
|
754 transparent = -1;
|
|
|
755 red = 0;
|
|
|
756 green = 0;
|
|
|
757 blue = 0;
|
|
|
758
|
|
|
759 transparent:
|
|
|
760
|
|
|
761 gdImageColorTransparent(src, -1);
|
|
526
|
762
|
|
484
|
763 dx = sx;
|
|
|
764 dy = sy;
|
|
|
765
|
|
|
766 if (conf->filter == NGX_HTTP_IMAGE_RESIZE) {
|
|
|
767
|
|
510
|
768 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
769 dy = dy * ctx->max_width / dx;
|
|
484
|
770 dy = dy ? dy : 1;
|
|
510
|
771 dx = ctx->max_width;
|
|
484
|
772 }
|
|
|
773
|
|
510
|
774 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
775 dx = dx * ctx->max_height / dy;
|
|
484
|
776 dx = dx ? dx : 1;
|
|
510
|
777 dy = ctx->max_height;
|
|
484
|
778 }
|
|
|
779
|
|
|
780 resize = 1;
|
|
|
781
|
|
|
782 } else { /* NGX_HTTP_IMAGE_CROP */
|
|
|
783
|
|
|
784 resize = 0;
|
|
|
785
|
|
510
|
786 if ((ngx_uint_t) (dx * 100 / dy)
|
|
|
787 < ctx->max_width * 100 / ctx->max_height)
|
|
|
788 {
|
|
|
789 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
790 dy = dy * ctx->max_width / dx;
|
|
484
|
791 dy = dy ? dy : 1;
|
|
510
|
792 dx = ctx->max_width;
|
|
484
|
793 resize = 1;
|
|
|
794 }
|
|
|
795
|
|
|
796 } else {
|
|
510
|
797 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
798 dx = dx * ctx->max_height / dy;
|
|
484
|
799 dx = dx ? dx : 1;
|
|
510
|
800 dy = ctx->max_height;
|
|
484
|
801 resize = 1;
|
|
|
802 }
|
|
|
803 }
|
|
|
804 }
|
|
|
805
|
|
|
806 if (resize) {
|
|
528
|
807 dst = ngx_http_image_new(r, dx, dy, palette);
|
|
484
|
808 if (dst == NULL) {
|
|
|
809 gdImageDestroy(src);
|
|
|
810 return NULL;
|
|
|
811 }
|
|
|
812
|
|
528
|
813 if (colors == 0) {
|
|
|
814 gdImageSaveAlpha(dst, 1);
|
|
|
815 gdImageAlphaBlending(dst, 0);
|
|
|
816 }
|
|
|
817
|
|
484
|
818 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
|
|
|
819
|
|
528
|
820 if (colors) {
|
|
|
821 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
822 }
|
|
|
823
|
|
484
|
824 gdImageDestroy(src);
|
|
|
825
|
|
|
826 } else {
|
|
|
827 dst = src;
|
|
|
828 }
|
|
|
829
|
|
|
830 if (conf->filter == NGX_HTTP_IMAGE_CROP) {
|
|
|
831
|
|
|
832 src = dst;
|
|
|
833
|
|
510
|
834 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
835 ox = dx - ctx->max_width;
|
|
484
|
836
|
|
|
837 } else {
|
|
|
838 ox = 0;
|
|
|
839 }
|
|
|
840
|
|
510
|
841 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
842 oy = dy - ctx->max_height;
|
|
484
|
843
|
|
|
844 } else {
|
|
|
845 oy = 0;
|
|
|
846 }
|
|
|
847
|
|
|
848 if (ox || oy) {
|
|
|
849
|
|
|
850 dst = ngx_http_image_new(r, dx - ox, dy - oy, colors);
|
|
|
851
|
|
|
852 if (dst == NULL) {
|
|
|
853 gdImageDestroy(src);
|
|
|
854 return NULL;
|
|
|
855 }
|
|
|
856
|
|
|
857 ox /= 2;
|
|
|
858 oy /= 2;
|
|
|
859
|
|
|
860 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
861 "image crop: %d x %d @ %d x %d",
|
|
|
862 dx, dy, ox, oy);
|
|
|
863
|
|
528
|
864 if (colors == 0) {
|
|
|
865 gdImageSaveAlpha(dst, 1);
|
|
|
866 gdImageAlphaBlending(dst, 0);
|
|
|
867 }
|
|
|
868
|
|
484
|
869 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy);
|
|
|
870
|
|
528
|
871 if (colors) {
|
|
|
872 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
873 }
|
|
|
874
|
|
484
|
875 gdImageDestroy(src);
|
|
|
876 }
|
|
|
877 }
|
|
|
878
|
|
526
|
879 if (transparent != -1 && colors) {
|
|
|
880 gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue));
|
|
|
881 }
|
|
484
|
882
|
|
|
883 out = ngx_http_image_out(r, ctx->type, dst, &size);
|
|
|
884
|
|
|
885 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
886 "image: %d x %d %d", sx, sy, colors);
|
|
|
887
|
|
|
888 gdImageDestroy(dst);
|
|
|
889 ngx_pfree(r->pool, ctx->image);
|
|
|
890
|
|
|
891 if (out == NULL) {
|
|
|
892 return NULL;
|
|
|
893 }
|
|
|
894
|
|
|
895 cln = ngx_pool_cleanup_add(r->pool, 0);
|
|
|
896 if (cln == NULL) {
|
|
|
897 gdFree(out);
|
|
|
898 return NULL;
|
|
|
899 }
|
|
|
900
|
|
|
901 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
902 if (b == NULL) {
|
|
|
903 gdFree(out);
|
|
|
904 return NULL;
|
|
|
905 }
|
|
|
906
|
|
|
907 cln->handler = ngx_http_image_cleanup;
|
|
|
908 cln->data = out;
|
|
|
909
|
|
|
910 b->pos = out;
|
|
|
911 b->last = out + size;
|
|
|
912 b->memory = 1;
|
|
|
913 b->last_buf = 1;
|
|
|
914
|
|
|
915 ngx_http_image_length(r, b);
|
|
|
916
|
|
|
917 return b;
|
|
|
918 }
|
|
|
919
|
|
|
920
|
|
|
921 static gdImagePtr
|
|
|
922 ngx_http_image_source(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
923 {
|
|
|
924 char *failed;
|
|
|
925 gdImagePtr img;
|
|
|
926
|
|
|
927 img = NULL;
|
|
|
928
|
|
|
929 switch (ctx->type) {
|
|
|
930
|
|
|
931 case NGX_HTTP_IMAGE_JPEG:
|
|
|
932 img = gdImageCreateFromJpegPtr(ctx->length, ctx->image);
|
|
|
933 failed = "gdImageCreateFromJpegPtr() failed";
|
|
|
934 break;
|
|
|
935
|
|
|
936 case NGX_HTTP_IMAGE_GIF:
|
|
|
937 img = gdImageCreateFromGifPtr(ctx->length, ctx->image);
|
|
|
938 failed = "gdImageCreateFromGifPtr() failed";
|
|
|
939 break;
|
|
|
940
|
|
|
941 case NGX_HTTP_IMAGE_PNG:
|
|
|
942 img = gdImageCreateFromPngPtr(ctx->length, ctx->image);
|
|
|
943 failed = "gdImageCreateFromPngPtr() failed";
|
|
|
944 break;
|
|
|
945
|
|
|
946 default:
|
|
|
947 failed = "unknown image type";
|
|
|
948 break;
|
|
|
949 }
|
|
|
950
|
|
|
951 if (img == NULL) {
|
|
|
952 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
953 }
|
|
|
954
|
|
|
955 return img;
|
|
|
956 }
|
|
|
957
|
|
|
958
|
|
|
959 static gdImagePtr
|
|
|
960 ngx_http_image_new(ngx_http_request_t *r, int w, int h, int colors)
|
|
|
961 {
|
|
|
962 gdImagePtr img;
|
|
|
963
|
|
|
964 if (colors == 0) {
|
|
|
965 img = gdImageCreateTrueColor(w, h);
|
|
|
966
|
|
|
967 if (img == NULL) {
|
|
|
968 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
969 "gdImageCreateTrueColor() failed");
|
|
|
970 return NULL;
|
|
|
971 }
|
|
|
972
|
|
|
973 } else {
|
|
|
974 img = gdImageCreate(w, h);
|
|
|
975
|
|
|
976 if (img == NULL) {
|
|
|
977 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
978 "gdImageCreate() failed");
|
|
|
979 return NULL;
|
|
|
980 }
|
|
|
981 }
|
|
|
982
|
|
|
983 return img;
|
|
|
984 }
|
|
|
985
|
|
|
986
|
|
|
987 static u_char *
|
|
|
988 ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, gdImagePtr img,
|
|
|
989 int *size)
|
|
|
990 {
|
|
492
|
991 char *failed;
|
|
|
992 u_char *out;
|
|
|
993 ngx_http_image_filter_conf_t *conf;
|
|
484
|
994
|
|
|
995 out = NULL;
|
|
|
996
|
|
|
997 switch (type) {
|
|
|
998
|
|
|
999 case NGX_HTTP_IMAGE_JPEG:
|
|
492
|
1000 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
1001 out = gdImageJpegPtr(img, size, conf->jpeg_quality);
|
|
484
|
1002 failed = "gdImageJpegPtr() failed";
|
|
|
1003 break;
|
|
|
1004
|
|
|
1005 case NGX_HTTP_IMAGE_GIF:
|
|
|
1006 out = gdImageGifPtr(img, size);
|
|
|
1007 failed = "gdImageGifPtr() failed";
|
|
|
1008 break;
|
|
|
1009
|
|
|
1010 case NGX_HTTP_IMAGE_PNG:
|
|
|
1011 out = gdImagePngPtr(img, size);
|
|
|
1012 failed = "gdImagePngPtr() failed";
|
|
|
1013 break;
|
|
|
1014
|
|
|
1015 default:
|
|
|
1016 failed = "unknown image type";
|
|
|
1017 break;
|
|
|
1018 }
|
|
|
1019
|
|
|
1020 if (out == NULL) {
|
|
|
1021 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
1022 }
|
|
|
1023
|
|
|
1024 return out;
|
|
|
1025 }
|
|
|
1026
|
|
|
1027
|
|
|
1028 static void
|
|
|
1029 ngx_http_image_cleanup(void *data)
|
|
|
1030 {
|
|
|
1031 gdFree(data);
|
|
|
1032 }
|
|
|
1033
|
|
|
1034
|
|
510
|
1035 static ngx_uint_t
|
|
|
1036 ngx_http_image_filter_get_value(ngx_http_request_t *r,
|
|
|
1037 ngx_http_complex_value_t *cv, ngx_uint_t v)
|
|
|
1038 {
|
|
|
1039 ngx_str_t val;
|
|
|
1040
|
|
|
1041 if (cv == NULL) {
|
|
|
1042 return v;
|
|
|
1043 }
|
|
|
1044
|
|
|
1045 if (ngx_http_complex_value(r, cv, &val) != NGX_OK) {
|
|
|
1046 return 0;
|
|
|
1047 }
|
|
|
1048
|
|
|
1049 return ngx_http_image_filter_value(&val);
|
|
|
1050 }
|
|
|
1051
|
|
|
1052
|
|
|
1053 static ngx_uint_t
|
|
|
1054 ngx_http_image_filter_value(ngx_str_t *value)
|
|
|
1055 {
|
|
|
1056 ngx_int_t n;
|
|
|
1057
|
|
|
1058 if (value->len == 1 && value->data[0] == '-') {
|
|
|
1059 return (ngx_uint_t) -1;
|
|
|
1060 }
|
|
|
1061
|
|
|
1062 n = ngx_atoi(value->data, value->len);
|
|
|
1063
|
|
|
1064 if (n > 0) {
|
|
|
1065 return (ngx_uint_t) n;
|
|
|
1066 }
|
|
|
1067
|
|
|
1068 return 0;
|
|
|
1069 }
|
|
|
1070
|
|
|
1071
|
|
484
|
1072 static void *
|
|
|
1073 ngx_http_image_filter_create_conf(ngx_conf_t *cf)
|
|
|
1074 {
|
|
|
1075 ngx_http_image_filter_conf_t *conf;
|
|
|
1076
|
|
|
1077 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t));
|
|
|
1078 if (conf == NULL) {
|
|
496
|
1079 return NULL;
|
|
484
|
1080 }
|
|
|
1081
|
|
|
1082 conf->filter = NGX_CONF_UNSET_UINT;
|
|
492
|
1083 conf->jpeg_quality = NGX_CONF_UNSET;
|
|
528
|
1084 conf->transparency = NGX_CONF_UNSET;
|
|
484
|
1085 conf->buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
1086
|
|
|
1087 return conf;
|
|
|
1088 }
|
|
|
1089
|
|
|
1090
|
|
|
1091 static char *
|
|
|
1092 ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1093 {
|
|
|
1094 ngx_http_image_filter_conf_t *prev = parent;
|
|
|
1095 ngx_http_image_filter_conf_t *conf = child;
|
|
|
1096
|
|
|
1097 if (conf->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1098
|
|
|
1099 if (prev->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1100 conf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1101
|
|
|
1102 } else {
|
|
|
1103 conf->filter = prev->filter;
|
|
|
1104 conf->width = prev->width;
|
|
|
1105 conf->height = prev->height;
|
|
510
|
1106 conf->wcv = prev->wcv;
|
|
|
1107 conf->hcv = prev->hcv;
|
|
484
|
1108 }
|
|
|
1109 }
|
|
|
1110
|
|
492
|
1111 /* 75 is libjpeg default quality */
|
|
|
1112 ngx_conf_merge_value(conf->jpeg_quality, prev->jpeg_quality, 75);
|
|
|
1113
|
|
528
|
1114 ngx_conf_merge_value(conf->transparency, prev->transparency, 1);
|
|
|
1115
|
|
484
|
1116 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
|
|
|
1117 1 * 1024 * 1024);
|
|
|
1118
|
|
|
1119 return NGX_CONF_OK;
|
|
|
1120 }
|
|
|
1121
|
|
|
1122
|
|
|
1123 static char *
|
|
|
1124 ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
1125 {
|
|
|
1126 ngx_http_image_filter_conf_t *imcf = conf;
|
|
|
1127
|
|
510
|
1128 ngx_str_t *value;
|
|
|
1129 ngx_int_t n;
|
|
|
1130 ngx_uint_t i;
|
|
|
1131 ngx_http_complex_value_t cv;
|
|
|
1132 ngx_http_compile_complex_value_t ccv;
|
|
484
|
1133
|
|
|
1134 value = cf->args->elts;
|
|
|
1135
|
|
|
1136 i = 1;
|
|
|
1137
|
|
|
1138 if (cf->args->nelts == 2) {
|
|
|
1139 if (ngx_strcmp(value[i].data, "off") == 0) {
|
|
|
1140 imcf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1141
|
|
|
1142 } else if (ngx_strcmp(value[i].data, "test") == 0) {
|
|
|
1143 imcf->filter = NGX_HTTP_IMAGE_TEST;
|
|
|
1144
|
|
|
1145 } else if (ngx_strcmp(value[i].data, "size") == 0) {
|
|
|
1146 imcf->filter = NGX_HTTP_IMAGE_SIZE;
|
|
|
1147
|
|
|
1148 } else {
|
|
|
1149 goto failed;
|
|
|
1150 }
|
|
|
1151
|
|
|
1152 return NGX_CONF_OK;
|
|
|
1153 }
|
|
|
1154
|
|
|
1155 if (ngx_strcmp(value[i].data, "resize") == 0) {
|
|
|
1156 imcf->filter = NGX_HTTP_IMAGE_RESIZE;
|
|
|
1157
|
|
|
1158 } else if (ngx_strcmp(value[i].data, "crop") == 0) {
|
|
|
1159 imcf->filter = NGX_HTTP_IMAGE_CROP;
|
|
|
1160
|
|
|
1161 } else {
|
|
|
1162 goto failed;
|
|
|
1163 }
|
|
|
1164
|
|
510
|
1165 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1166
|
|
|
1167 ccv.cf = cf;
|
|
|
1168 ccv.value = &value[++i];
|
|
|
1169 ccv.complex_value = &cv;
|
|
484
|
1170
|
|
510
|
1171 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1172 return NGX_CONF_ERROR;
|
|
|
1173 }
|
|
484
|
1174
|
|
510
|
1175 if (cv.lengths == NULL) {
|
|
|
1176 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1177
|
|
|
1178 if (n == 0) {
|
|
484
|
1179 goto failed;
|
|
|
1180 }
|
|
|
1181
|
|
|
1182 imcf->width = (ngx_uint_t) n;
|
|
510
|
1183
|
|
|
1184 } else {
|
|
|
1185 imcf->wcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1186 if (imcf->wcv == NULL) {
|
|
|
1187 return NGX_CONF_ERROR;
|
|
|
1188 }
|
|
|
1189
|
|
|
1190 *imcf->wcv = cv;
|
|
484
|
1191 }
|
|
|
1192
|
|
510
|
1193 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1194
|
|
|
1195 ccv.cf = cf;
|
|
|
1196 ccv.value = &value[++i];
|
|
|
1197 ccv.complex_value = &cv;
|
|
484
|
1198
|
|
510
|
1199 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1200 return NGX_CONF_ERROR;
|
|
|
1201 }
|
|
484
|
1202
|
|
510
|
1203 if (cv.lengths == NULL) {
|
|
|
1204 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1205
|
|
|
1206 if (n == 0) {
|
|
484
|
1207 goto failed;
|
|
|
1208 }
|
|
|
1209
|
|
|
1210 imcf->height = (ngx_uint_t) n;
|
|
510
|
1211
|
|
|
1212 } else {
|
|
|
1213 imcf->hcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1214 if (imcf->hcv == NULL) {
|
|
|
1215 return NGX_CONF_ERROR;
|
|
|
1216 }
|
|
|
1217
|
|
|
1218 *imcf->hcv = cv;
|
|
484
|
1219 }
|
|
|
1220
|
|
|
1221 return NGX_CONF_OK;
|
|
|
1222
|
|
|
1223 failed:
|
|
|
1224
|
|
|
1225 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"",
|
|
|
1226 &value[i]);
|
|
|
1227
|
|
|
1228 return NGX_CONF_ERROR;
|
|
|
1229 }
|
|
|
1230
|
|
|
1231
|
|
|
1232 static ngx_int_t
|
|
|
1233 ngx_http_image_filter_init(ngx_conf_t *cf)
|
|
|
1234 {
|
|
|
1235 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1236 ngx_http_top_header_filter = ngx_http_image_header_filter;
|
|
|
1237
|
|
|
1238 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1239 ngx_http_top_body_filter = ngx_http_image_body_filter;
|
|
|
1240
|
|
|
1241 return NGX_OK;
|
|
|
1242 }
|
