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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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618
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19 #define NGX_HTTP_IMAGE_ROTATE 5
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20
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21
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22 #define NGX_HTTP_IMAGE_START 0
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23 #define NGX_HTTP_IMAGE_READ 1
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24 #define NGX_HTTP_IMAGE_PROCESS 2
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488
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25 #define NGX_HTTP_IMAGE_PASS 3
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26 #define NGX_HTTP_IMAGE_DONE 4
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27
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28
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29 #define NGX_HTTP_IMAGE_NONE 0
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30 #define NGX_HTTP_IMAGE_JPEG 1
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31 #define NGX_HTTP_IMAGE_GIF 2
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32 #define NGX_HTTP_IMAGE_PNG 3
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33
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34
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35 #define NGX_HTTP_IMAGE_BUFFERED 0x08
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36
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37
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38 typedef struct {
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39 ngx_uint_t filter;
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40 ngx_uint_t width;
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41 ngx_uint_t height;
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618
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42 ngx_uint_t angle;
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594
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43 ngx_uint_t jpeg_quality;
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44
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45 ngx_flag_t transparency;
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46
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510
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47 ngx_http_complex_value_t *wcv;
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48 ngx_http_complex_value_t *hcv;
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618
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49 ngx_http_complex_value_t *acv;
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594
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50 ngx_http_complex_value_t *jqcv;
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510
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51
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484
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52 size_t buffer_size;
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53 } ngx_http_image_filter_conf_t;
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54
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55
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56 typedef struct {
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57 u_char *image;
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58 u_char *last;
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59
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60 size_t length;
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61
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62 ngx_uint_t width;
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63 ngx_uint_t height;
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510
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64 ngx_uint_t max_width;
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65 ngx_uint_t max_height;
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618
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66 ngx_uint_t angle;
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510
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67
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68 ngx_uint_t phase;
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69 ngx_uint_t type;
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558
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70 ngx_uint_t force;
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484
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71 } ngx_http_image_filter_ctx_t;
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72
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73
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488
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74 static ngx_int_t ngx_http_image_send(ngx_http_request_t *r,
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75 ngx_http_image_filter_ctx_t *ctx, ngx_chain_t *in);
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484
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76 static ngx_uint_t ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in);
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77 static ngx_int_t ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in);
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78 static ngx_buf_t *ngx_http_image_process(ngx_http_request_t *r);
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79 static ngx_buf_t *ngx_http_image_json(ngx_http_request_t *r,
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80 ngx_http_image_filter_ctx_t *ctx);
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81 static ngx_buf_t *ngx_http_image_asis(ngx_http_request_t *r,
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82 ngx_http_image_filter_ctx_t *ctx);
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83 static void ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b);
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84 static ngx_int_t ngx_http_image_size(ngx_http_request_t *r,
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85 ngx_http_image_filter_ctx_t *ctx);
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86
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87 static ngx_buf_t *ngx_http_image_resize(ngx_http_request_t *r,
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88 ngx_http_image_filter_ctx_t *ctx);
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89 static gdImagePtr ngx_http_image_source(ngx_http_request_t *r,
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90 ngx_http_image_filter_ctx_t *ctx);
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91 static gdImagePtr ngx_http_image_new(ngx_http_request_t *r, int w, int h,
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92 int colors);
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93 static u_char *ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type,
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94 gdImagePtr img, int *size);
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95 static void ngx_http_image_cleanup(void *data);
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510
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96 static ngx_uint_t ngx_http_image_filter_get_value(ngx_http_request_t *r,
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97 ngx_http_complex_value_t *cv, ngx_uint_t v);
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98 static ngx_uint_t ngx_http_image_filter_value(ngx_str_t *value);
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484
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99
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100
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101 static void *ngx_http_image_filter_create_conf(ngx_conf_t *cf);
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102 static char *ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent,
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103 void *child);
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104 static char *ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd,
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105 void *conf);
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594
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106 static char *ngx_http_image_filter_jpeg_quality(ngx_conf_t *cf,
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107 ngx_command_t *cmd, void *conf);
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484
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108 static ngx_int_t ngx_http_image_filter_init(ngx_conf_t *cf);
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109
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110
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111 static ngx_command_t ngx_http_image_filter_commands[] = {
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112
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113 { ngx_string("image_filter"),
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618
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114 NGX_HTTP_LOC_CONF|NGX_CONF_TAKE13|NGX_CONF_TAKE2,
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484
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115 ngx_http_image_filter,
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116 NGX_HTTP_LOC_CONF_OFFSET,
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117 0,
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118 NULL },
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119
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492
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120 { ngx_string("image_filter_jpeg_quality"),
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121 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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594
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122 ngx_http_image_filter_jpeg_quality,
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492
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123 NGX_HTTP_LOC_CONF_OFFSET,
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124 0,
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492
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125 NULL },
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126
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528
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127 { ngx_string("image_filter_transparency"),
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128 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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129 ngx_conf_set_flag_slot,
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130 NGX_HTTP_LOC_CONF_OFFSET,
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131 offsetof(ngx_http_image_filter_conf_t, transparency),
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132 NULL },
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133
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484
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134 { ngx_string("image_filter_buffer"),
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135 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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136 ngx_conf_set_size_slot,
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137 NGX_HTTP_LOC_CONF_OFFSET,
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138 offsetof(ngx_http_image_filter_conf_t, buffer_size),
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139 NULL },
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140
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141 ngx_null_command
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142 };
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143
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144
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145 static ngx_http_module_t ngx_http_image_filter_module_ctx = {
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146 NULL, /* preconfiguration */
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147 ngx_http_image_filter_init, /* postconfiguration */
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148
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149 NULL, /* create main configuration */
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150 NULL, /* init main configuration */
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151
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152 NULL, /* create server configuration */
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153 NULL, /* merge server configuration */
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154
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155 ngx_http_image_filter_create_conf, /* create location configuration */
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156 ngx_http_image_filter_merge_conf /* merge location configuration */
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157 };
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158
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159
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160 ngx_module_t ngx_http_image_filter_module = {
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161 NGX_MODULE_V1,
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162 &ngx_http_image_filter_module_ctx, /* module context */
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163 ngx_http_image_filter_commands, /* module directives */
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164 NGX_HTTP_MODULE, /* module type */
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165 NULL, /* init master */
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166 NULL, /* init module */
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167 NULL, /* init process */
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168 NULL, /* init thread */
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169 NULL, /* exit thread */
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170 NULL, /* exit process */
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171 NULL, /* exit master */
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172 NGX_MODULE_V1_PADDING
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173 };
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174
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175
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176 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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177 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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178
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179
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180 static ngx_str_t ngx_http_image_types[] = {
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181 ngx_string("image/jpeg"),
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182 ngx_string("image/gif"),
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183 ngx_string("image/png")
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184 };
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185
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186
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187 static ngx_int_t
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188 ngx_http_image_header_filter(ngx_http_request_t *r)
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189 {
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190 off_t len;
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191 ngx_http_image_filter_ctx_t *ctx;
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192 ngx_http_image_filter_conf_t *conf;
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193
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194 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) {
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195 return ngx_http_next_header_filter(r);
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196 }
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197
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490
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198 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
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199
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200 if (ctx) {
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201 ngx_http_set_ctx(r, NULL, ngx_http_image_filter_module);
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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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484
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205 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
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206
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207 if (conf->filter == NGX_HTTP_IMAGE_OFF) {
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208 return ngx_http_next_header_filter(r);
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209 }
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210
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211 if (r->headers_out.content_type.len
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212 >= sizeof("multipart/x-mixed-replace") - 1
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213 && ngx_strncasecmp(r->headers_out.content_type.data,
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214 (u_char *) "multipart/x-mixed-replace",
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215 sizeof("multipart/x-mixed-replace") - 1)
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216 == 0)
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217 {
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218 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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219 "image filter: multipart/x-mixed-replace response");
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220
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221 return NGX_ERROR;
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222 }
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223
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224 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_image_filter_ctx_t));
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225 if (ctx == NULL) {
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226 return NGX_ERROR;
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227 }
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228
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229 ngx_http_set_ctx(r, ctx, ngx_http_image_filter_module);
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230
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231 len = r->headers_out.content_length_n;
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232
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233 if (len != -1 && len > (off_t) conf->buffer_size) {
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234 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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235 "image filter: too big response: %O", len);
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236
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592
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237 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
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484
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238 }
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239
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240 if (len == -1) {
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241 ctx->length = conf->buffer_size;
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242
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243 } else {
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244 ctx->length = (size_t) len;
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245 }
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246
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247 if (r->headers_out.refresh) {
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248 r->headers_out.refresh->hash = 0;
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249 }
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250
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251 r->main_filter_need_in_memory = 1;
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252 r->allow_ranges = 0;
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253
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254 return NGX_OK;
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255 }
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256
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257
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258 static ngx_int_t
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259 ngx_http_image_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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260 {
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261 ngx_int_t rc;
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262 ngx_str_t *ct;
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263 ngx_chain_t out;
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264 ngx_http_image_filter_ctx_t *ctx;
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265 ngx_http_image_filter_conf_t *conf;
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266
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267 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "image filter");
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268
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269 if (in == 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 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
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274
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275 if (ctx == NULL) {
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276 return ngx_http_next_body_filter(r, in);
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277 }
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278
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279 switch (ctx->phase) {
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280
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281 case NGX_HTTP_IMAGE_START:
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282
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283 ctx->type = ngx_http_image_test(r, in);
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284
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285 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
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286
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287 if (ctx->type == NGX_HTTP_IMAGE_NONE) {
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288
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289 if (conf->filter == NGX_HTTP_IMAGE_SIZE) {
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290 out.buf = ngx_http_image_json(r, NULL);
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291
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292 if (out.buf) {
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293 out.next = NULL;
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294 ctx->phase = NGX_HTTP_IMAGE_DONE;
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484
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295
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488
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296 return ngx_http_image_send(r, ctx, &out);
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484
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297 }
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298 }
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299
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300 return ngx_http_filter_finalize_request(r,
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301 &ngx_http_image_filter_module,
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484
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302 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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303 }
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304
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305 /* override content type */
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306
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307 ct = &ngx_http_image_types[ctx->type - 1];
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308 r->headers_out.content_type_len = ct->len;
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309 r->headers_out.content_type = *ct;
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494
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310 r->headers_out.content_type_lowcase = NULL;
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484
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311
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312 if (conf->filter == NGX_HTTP_IMAGE_TEST) {
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488
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313 ctx->phase = NGX_HTTP_IMAGE_PASS;
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314
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315 return ngx_http_image_send(r, ctx, in);
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484
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316 }
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317
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318 ctx->phase = NGX_HTTP_IMAGE_READ;
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319
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320 /* fall through */
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321
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322 case NGX_HTTP_IMAGE_READ:
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323
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324 rc = ngx_http_image_read(r, in);
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325
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326 if (rc == NGX_AGAIN) {
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327 return NGX_OK;
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328 }
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329
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330 if (rc == NGX_ERROR) {
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331 return ngx_http_filter_finalize_request(r,
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488
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332 &ngx_http_image_filter_module,
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484
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333 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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334 }
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335
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336 /* fall through */
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337
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338 case NGX_HTTP_IMAGE_PROCESS:
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339
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340 out.buf = ngx_http_image_process(r);
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341
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342 if (out.buf == NULL) {
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343 return ngx_http_filter_finalize_request(r,
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488
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344 &ngx_http_image_filter_module,
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484
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345 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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346 }
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347
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348 out.next = NULL;
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488
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349 ctx->phase = NGX_HTTP_IMAGE_PASS;
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350
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351 return ngx_http_image_send(r, ctx, &out);
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484
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352
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488
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353 case NGX_HTTP_IMAGE_PASS:
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354
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355 return ngx_http_next_body_filter(r, in);
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484
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356
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357 default: /* NGX_HTTP_IMAGE_DONE */
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358
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488
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359 rc = ngx_http_next_body_filter(r, NULL);
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360
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361 /* NGX_ERROR resets any pending data */
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362 return (rc == NGX_OK) ? NGX_ERROR : rc;
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484
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363 }
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488
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364 }
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484
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365
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488
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366
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367 static ngx_int_t
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368 ngx_http_image_send(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx,
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369 ngx_chain_t *in)
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370 {
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371 ngx_int_t rc;
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484
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372
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373 rc = ngx_http_next_header_filter(r);
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374
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375 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
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488
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376 return NGX_ERROR;
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484
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377 }
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378
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488
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379 rc = ngx_http_next_body_filter(r, in);
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380
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381 if (ctx->phase == NGX_HTTP_IMAGE_DONE) {
|
|
|
382 /* NGX_ERROR resets any pending data */
|
|
|
383 return (rc == NGX_OK) ? NGX_ERROR : rc;
|
|
|
384 }
|
|
|
385
|
|
|
386 return rc;
|
|
484
|
387 }
|
|
|
388
|
|
|
389
|
|
|
390 static ngx_uint_t
|
|
|
391 ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
392 {
|
|
|
393 u_char *p;
|
|
|
394
|
|
|
395 p = in->buf->pos;
|
|
|
396
|
|
|
397 if (in->buf->last - p < 16) {
|
|
|
398 return NGX_HTTP_IMAGE_NONE;
|
|
|
399 }
|
|
|
400
|
|
|
401 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
402 "image filter: \"%c%c\"", p[0], p[1]);
|
|
|
403
|
|
|
404 if (p[0] == 0xff && p[1] == 0xd8) {
|
|
|
405
|
|
|
406 /* JPEG */
|
|
|
407
|
|
|
408 return NGX_HTTP_IMAGE_JPEG;
|
|
|
409
|
|
|
410 } else if (p[0] == 'G' && p[1] == 'I' && p[2] == 'F' && p[3] == '8'
|
|
498
|
411 && p[5] == 'a')
|
|
484
|
412 {
|
|
498
|
413 if (p[4] == '9' || p[4] == '7') {
|
|
|
414 /* GIF */
|
|
|
415 return NGX_HTTP_IMAGE_GIF;
|
|
|
416 }
|
|
484
|
417
|
|
|
418 } else if (p[0] == 0x89 && p[1] == 'P' && p[2] == 'N' && p[3] == 'G'
|
|
|
419 && p[4] == 0x0d && p[5] == 0x0a && p[6] == 0x1a && p[7] == 0x0a)
|
|
|
420 {
|
|
|
421 /* PNG */
|
|
|
422
|
|
|
423 return NGX_HTTP_IMAGE_PNG;
|
|
|
424 }
|
|
|
425
|
|
|
426 return NGX_HTTP_IMAGE_NONE;
|
|
|
427 }
|
|
|
428
|
|
|
429
|
|
|
430 static ngx_int_t
|
|
|
431 ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
432 {
|
|
|
433 u_char *p;
|
|
|
434 size_t size, rest;
|
|
|
435 ngx_buf_t *b;
|
|
|
436 ngx_chain_t *cl;
|
|
|
437 ngx_http_image_filter_ctx_t *ctx;
|
|
|
438
|
|
|
439 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
|
|
|
440
|
|
|
441 if (ctx->image == NULL) {
|
|
|
442 ctx->image = ngx_palloc(r->pool, ctx->length);
|
|
|
443 if (ctx->image == NULL) {
|
|
|
444 return NGX_ERROR;
|
|
|
445 }
|
|
|
446
|
|
|
447 ctx->last = ctx->image;
|
|
|
448 }
|
|
|
449
|
|
|
450 p = ctx->last;
|
|
|
451
|
|
|
452 for (cl = in; cl; cl = cl->next) {
|
|
|
453
|
|
|
454 b = cl->buf;
|
|
|
455 size = b->last - b->pos;
|
|
|
456
|
|
|
457 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
458 "image buf: %uz", size);
|
|
|
459
|
|
|
460 rest = ctx->image + ctx->length - p;
|
|
|
461 size = (rest < size) ? rest : size;
|
|
|
462
|
|
|
463 p = ngx_cpymem(p, b->pos, size);
|
|
|
464 b->pos += size;
|
|
|
465
|
|
|
466 if (b->last_buf) {
|
|
|
467 ctx->last = p;
|
|
|
468 return NGX_OK;
|
|
|
469 }
|
|
|
470 }
|
|
|
471
|
|
|
472 ctx->last = p;
|
|
|
473 r->connection->buffered |= NGX_HTTP_IMAGE_BUFFERED;
|
|
|
474
|
|
|
475 return NGX_AGAIN;
|
|
|
476 }
|
|
|
477
|
|
|
478
|
|
|
479 static ngx_buf_t *
|
|
|
480 ngx_http_image_process(ngx_http_request_t *r)
|
|
|
481 {
|
|
|
482 ngx_int_t rc;
|
|
|
483 ngx_http_image_filter_ctx_t *ctx;
|
|
|
484 ngx_http_image_filter_conf_t *conf;
|
|
|
485
|
|
|
486 r->connection->buffered &= ~NGX_HTTP_IMAGE_BUFFERED;
|
|
|
487
|
|
|
488 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
|
|
|
489
|
|
|
490 rc = ngx_http_image_size(r, ctx);
|
|
|
491
|
|
|
492 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
493
|
|
|
494 if (conf->filter == NGX_HTTP_IMAGE_SIZE) {
|
|
510
|
495 return ngx_http_image_json(r, rc == NGX_OK ? ctx : NULL);
|
|
|
496 }
|
|
484
|
497
|
|
618
|
498 ctx->angle = ngx_http_image_filter_get_value(r, conf->acv, conf->angle);
|
|
|
499
|
|
|
500 if (conf->filter == NGX_HTTP_IMAGE_ROTATE) {
|
|
|
501
|
|
|
502 if (ctx->angle != 90 && ctx->angle != 180 && ctx->angle != 270) {
|
|
|
503 return NULL;
|
|
|
504 }
|
|
|
505
|
|
|
506 return ngx_http_image_resize(r, ctx);
|
|
|
507 }
|
|
|
508
|
|
510
|
509 ctx->max_width = ngx_http_image_filter_get_value(r, conf->wcv, conf->width);
|
|
|
510 if (ctx->max_width == 0) {
|
|
|
511 return NULL;
|
|
484
|
512 }
|
|
|
513
|
|
510
|
514 ctx->max_height = ngx_http_image_filter_get_value(r, conf->hcv,
|
|
|
515 conf->height);
|
|
|
516 if (ctx->max_height == 0) {
|
|
|
517 return NULL;
|
|
|
518 }
|
|
|
519
|
|
|
520 if (rc == NGX_OK
|
|
|
521 && ctx->width <= ctx->max_width
|
|
558
|
522 && ctx->height <= ctx->max_height
|
|
618
|
523 && ctx->angle == 0
|
|
558
|
524 && !ctx->force)
|
|
510
|
525 {
|
|
|
526 return ngx_http_image_asis(r, ctx);
|
|
|
527 }
|
|
|
528
|
|
|
529 return ngx_http_image_resize(r, ctx);
|
|
484
|
530 }
|
|
|
531
|
|
|
532
|
|
|
533 static ngx_buf_t *
|
|
|
534 ngx_http_image_json(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
535 {
|
|
|
536 size_t len;
|
|
|
537 ngx_buf_t *b;
|
|
|
538
|
|
|
539 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
540 if (b == NULL) {
|
|
|
541 return NULL;
|
|
|
542 }
|
|
|
543
|
|
|
544 b->memory = 1;
|
|
|
545 b->last_buf = 1;
|
|
|
546
|
|
|
547 ngx_http_clean_header(r);
|
|
|
548
|
|
|
549 r->headers_out.status = NGX_HTTP_OK;
|
|
570
|
550 ngx_str_set(&r->headers_out.content_type, "text/plain");
|
|
494
|
551 r->headers_out.content_type_lowcase = NULL;
|
|
484
|
552
|
|
|
553 if (ctx == NULL) {
|
|
|
554 b->pos = (u_char *) "{}" CRLF;
|
|
|
555 b->last = b->pos + sizeof("{}" CRLF) - 1;
|
|
|
556
|
|
|
557 ngx_http_image_length(r, b);
|
|
|
558
|
|
|
559 return b;
|
|
|
560 }
|
|
|
561
|
|
|
562 len = sizeof("{ \"img\" : "
|
|
|
563 "{ \"width\": , \"height\": , \"type\": \"jpeg\" } }" CRLF) - 1
|
|
|
564 + 2 * NGX_SIZE_T_LEN;
|
|
|
565
|
|
|
566 b->pos = ngx_pnalloc(r->pool, len);
|
|
|
567 if (b->pos == NULL) {
|
|
|
568 return NULL;
|
|
|
569 }
|
|
|
570
|
|
|
571 b->last = ngx_sprintf(b->pos,
|
|
|
572 "{ \"img\" : "
|
|
|
573 "{ \"width\": %uz,"
|
|
|
574 " \"height\": %uz,"
|
|
|
575 " \"type\": \"%s\" } }" CRLF,
|
|
|
576 ctx->width, ctx->height,
|
|
|
577 ngx_http_image_types[ctx->type - 1].data + 6);
|
|
|
578
|
|
|
579 ngx_http_image_length(r, b);
|
|
|
580
|
|
|
581 return b;
|
|
|
582 }
|
|
|
583
|
|
|
584
|
|
|
585 static ngx_buf_t *
|
|
|
586 ngx_http_image_asis(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
587 {
|
|
|
588 ngx_buf_t *b;
|
|
|
589
|
|
|
590 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
591 if (b == NULL) {
|
|
|
592 return NULL;
|
|
|
593 }
|
|
|
594
|
|
|
595 b->pos = ctx->image;
|
|
|
596 b->last = ctx->last;
|
|
|
597 b->memory = 1;
|
|
|
598 b->last_buf = 1;
|
|
|
599
|
|
|
600 ngx_http_image_length(r, b);
|
|
|
601
|
|
|
602 return b;
|
|
|
603 }
|
|
|
604
|
|
|
605
|
|
|
606 static void
|
|
|
607 ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b)
|
|
|
608 {
|
|
|
609 r->headers_out.content_length_n = b->last - b->pos;
|
|
|
610
|
|
|
611 if (r->headers_out.content_length) {
|
|
|
612 r->headers_out.content_length->hash = 0;
|
|
|
613 }
|
|
|
614
|
|
|
615 r->headers_out.content_length = NULL;
|
|
|
616 }
|
|
|
617
|
|
|
618
|
|
|
619 static ngx_int_t
|
|
|
620 ngx_http_image_size(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
621 {
|
|
|
622 u_char *p, *last;
|
|
558
|
623 size_t len, app;
|
|
484
|
624 ngx_uint_t width, height;
|
|
|
625
|
|
|
626 p = ctx->image;
|
|
|
627
|
|
|
628 switch (ctx->type) {
|
|
|
629
|
|
|
630 case NGX_HTTP_IMAGE_JPEG:
|
|
|
631
|
|
|
632 p += 2;
|
|
|
633 last = ctx->image + ctx->length - 10;
|
|
558
|
634 width = 0;
|
|
|
635 height = 0;
|
|
|
636 app = 0;
|
|
484
|
637
|
|
|
638 while (p < last) {
|
|
|
639
|
|
|
640 if (p[0] == 0xff && p[1] != 0xff) {
|
|
|
641
|
|
|
642 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
558
|
643 "JPEG: %02xd %02xd", p[0], p[1]);
|
|
484
|
644
|
|
|
645 p++;
|
|
|
646
|
|
558
|
647 if ((*p == 0xc0 || *p == 0xc1 || *p == 0xc2 || *p == 0xc3
|
|
|
648 || *p == 0xc9 || *p == 0xca || *p == 0xcb)
|
|
|
649 && (width == 0 || height == 0))
|
|
484
|
650 {
|
|
558
|
651 width = p[6] * 256 + p[7];
|
|
|
652 height = p[4] * 256 + p[5];
|
|
484
|
653 }
|
|
|
654
|
|
|
655 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
656 "JPEG: %02xd %02xd", p[1], p[2]);
|
|
|
657
|
|
558
|
658 len = p[1] * 256 + p[2];
|
|
|
659
|
|
|
660 if (*p >= 0xe1 && *p <= 0xef) {
|
|
|
661 /* application data, e.g., EXIF, Adobe XMP, etc. */
|
|
|
662 app += len;
|
|
|
663 }
|
|
|
664
|
|
|
665 p += len;
|
|
484
|
666
|
|
|
667 continue;
|
|
|
668 }
|
|
|
669
|
|
|
670 p++;
|
|
|
671 }
|
|
|
672
|
|
558
|
673 if (width == 0 || height == 0) {
|
|
|
674 return NGX_DECLINED;
|
|
|
675 }
|
|
484
|
676
|
|
558
|
677 if (ctx->length / 20 < app) {
|
|
|
678 /* force conversion if application data consume more than 5% */
|
|
|
679 ctx->force = 1;
|
|
|
680 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
681 "app data size: %uz", app);
|
|
|
682 }
|
|
484
|
683
|
|
|
684 break;
|
|
|
685
|
|
|
686 case NGX_HTTP_IMAGE_GIF:
|
|
|
687
|
|
|
688 if (ctx->length < 10) {
|
|
|
689 return NGX_DECLINED;
|
|
|
690 }
|
|
|
691
|
|
|
692 width = p[7] * 256 + p[6];
|
|
|
693 height = p[9] * 256 + p[8];
|
|
|
694
|
|
|
695 break;
|
|
|
696
|
|
|
697 case NGX_HTTP_IMAGE_PNG:
|
|
|
698
|
|
|
699 if (ctx->length < 24) {
|
|
|
700 return NGX_DECLINED;
|
|
|
701 }
|
|
|
702
|
|
|
703 width = p[18] * 256 + p[19];
|
|
|
704 height = p[22] * 256 + p[23];
|
|
|
705
|
|
|
706 break;
|
|
|
707
|
|
|
708 default:
|
|
|
709
|
|
|
710 return NGX_DECLINED;
|
|
|
711 }
|
|
|
712
|
|
|
713 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
714 "image size: %d x %d", width, height);
|
|
|
715
|
|
|
716 ctx->width = width;
|
|
|
717 ctx->height = height;
|
|
|
718
|
|
|
719 return NGX_OK;
|
|
|
720 }
|
|
|
721
|
|
|
722
|
|
|
723 static ngx_buf_t *
|
|
|
724 ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
725 {
|
|
624
|
726 int sx, sy, dx, dy, ox, oy, ax, ay, size,
|
|
528
|
727 colors, palette, transparent,
|
|
618
|
728 red, green, blue, t;
|
|
484
|
729 u_char *out;
|
|
|
730 ngx_buf_t *b;
|
|
|
731 ngx_uint_t resize;
|
|
|
732 gdImagePtr src, dst;
|
|
|
733 ngx_pool_cleanup_t *cln;
|
|
|
734 ngx_http_image_filter_conf_t *conf;
|
|
|
735
|
|
|
736 src = ngx_http_image_source(r, ctx);
|
|
|
737
|
|
|
738 if (src == NULL) {
|
|
|
739 return NULL;
|
|
|
740 }
|
|
|
741
|
|
|
742 sx = gdImageSX(src);
|
|
|
743 sy = gdImageSY(src);
|
|
|
744
|
|
|
745 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
746
|
|
558
|
747 if (!ctx->force
|
|
618
|
748 && ctx->angle == 0
|
|
558
|
749 && (ngx_uint_t) sx <= ctx->max_width
|
|
510
|
750 && (ngx_uint_t) sy <= ctx->max_height)
|
|
|
751 {
|
|
484
|
752 gdImageDestroy(src);
|
|
|
753 return ngx_http_image_asis(r, ctx);
|
|
|
754 }
|
|
|
755
|
|
|
756 colors = gdImageColorsTotal(src);
|
|
528
|
757
|
|
|
758 if (colors && conf->transparency) {
|
|
|
759 transparent = gdImageGetTransparent(src);
|
|
|
760
|
|
|
761 if (transparent != -1) {
|
|
|
762 palette = colors;
|
|
|
763 red = gdImageRed(src, transparent);
|
|
|
764 green = gdImageGreen(src, transparent);
|
|
|
765 blue = gdImageBlue(src, transparent);
|
|
484
|
766
|
|
528
|
767 goto transparent;
|
|
|
768 }
|
|
|
769 }
|
|
526
|
770
|
|
528
|
771 palette = 0;
|
|
|
772 transparent = -1;
|
|
|
773 red = 0;
|
|
|
774 green = 0;
|
|
|
775 blue = 0;
|
|
|
776
|
|
|
777 transparent:
|
|
|
778
|
|
|
779 gdImageColorTransparent(src, -1);
|
|
526
|
780
|
|
484
|
781 dx = sx;
|
|
|
782 dy = sy;
|
|
|
783
|
|
|
784 if (conf->filter == NGX_HTTP_IMAGE_RESIZE) {
|
|
|
785
|
|
510
|
786 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
787 dy = dy * ctx->max_width / dx;
|
|
484
|
788 dy = dy ? dy : 1;
|
|
510
|
789 dx = ctx->max_width;
|
|
484
|
790 }
|
|
|
791
|
|
510
|
792 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
793 dx = dx * ctx->max_height / dy;
|
|
484
|
794 dx = dx ? dx : 1;
|
|
510
|
795 dy = ctx->max_height;
|
|
484
|
796 }
|
|
|
797
|
|
|
798 resize = 1;
|
|
|
799
|
|
618
|
800 } else if (conf->filter == NGX_HTTP_IMAGE_ROTATE) {
|
|
|
801
|
|
|
802 resize = 0;
|
|
|
803
|
|
484
|
804 } else { /* NGX_HTTP_IMAGE_CROP */
|
|
|
805
|
|
|
806 resize = 0;
|
|
|
807
|
|
510
|
808 if ((ngx_uint_t) (dx * 100 / dy)
|
|
|
809 < ctx->max_width * 100 / ctx->max_height)
|
|
|
810 {
|
|
|
811 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
812 dy = dy * ctx->max_width / dx;
|
|
484
|
813 dy = dy ? dy : 1;
|
|
510
|
814 dx = ctx->max_width;
|
|
484
|
815 resize = 1;
|
|
|
816 }
|
|
|
817
|
|
|
818 } else {
|
|
510
|
819 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
820 dx = dx * ctx->max_height / dy;
|
|
484
|
821 dx = dx ? dx : 1;
|
|
510
|
822 dy = ctx->max_height;
|
|
484
|
823 resize = 1;
|
|
|
824 }
|
|
|
825 }
|
|
|
826 }
|
|
|
827
|
|
|
828 if (resize) {
|
|
528
|
829 dst = ngx_http_image_new(r, dx, dy, palette);
|
|
484
|
830 if (dst == NULL) {
|
|
|
831 gdImageDestroy(src);
|
|
|
832 return NULL;
|
|
|
833 }
|
|
|
834
|
|
528
|
835 if (colors == 0) {
|
|
|
836 gdImageSaveAlpha(dst, 1);
|
|
|
837 gdImageAlphaBlending(dst, 0);
|
|
|
838 }
|
|
|
839
|
|
484
|
840 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
|
|
|
841
|
|
528
|
842 if (colors) {
|
|
|
843 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
844 }
|
|
|
845
|
|
484
|
846 gdImageDestroy(src);
|
|
|
847
|
|
|
848 } else {
|
|
|
849 dst = src;
|
|
|
850 }
|
|
|
851
|
|
618
|
852 if (ctx->angle) {
|
|
|
853 src = dst;
|
|
|
854
|
|
624
|
855 ax = (dx % 2 == 0) ? 1 : 0;
|
|
|
856 ay = (dy % 2 == 0) ? 1 : 0;
|
|
|
857
|
|
618
|
858 switch (ctx->angle) {
|
|
|
859
|
|
|
860 case 90:
|
|
|
861 case 270:
|
|
|
862 dst = ngx_http_image_new(r, dy, dx, palette);
|
|
|
863 if (dst == NULL) {
|
|
|
864 gdImageDestroy(src);
|
|
|
865 return NULL;
|
|
|
866 }
|
|
624
|
867 if (ctx->angle == 90) {
|
|
|
868 ox = dy / 2 + ay;
|
|
|
869 oy = dx / 2 - ax;
|
|
|
870
|
|
|
871 } else {
|
|
|
872 ox = dy / 2 - ay;
|
|
|
873 oy = dx / 2 + ax;
|
|
|
874 }
|
|
|
875
|
|
|
876 gdImageCopyRotated(dst, src, ox, oy, 0, 0,
|
|
|
877 dx + ax, dy + ay, ctx->angle);
|
|
618
|
878 gdImageDestroy(src);
|
|
620
|
879
|
|
|
880 t = dx;
|
|
|
881 dx = dy;
|
|
|
882 dy = t;
|
|
618
|
883 break;
|
|
|
884
|
|
|
885 case 180:
|
|
|
886 dst = ngx_http_image_new(r, dx, dy, palette);
|
|
|
887 if (dst == NULL) {
|
|
|
888 gdImageDestroy(src);
|
|
|
889 return NULL;
|
|
|
890 }
|
|
624
|
891 gdImageCopyRotated(dst, src, dx / 2 - ax, dy / 2 - ay, 0, 0,
|
|
|
892 dx + ax, dy + ay, ctx->angle);
|
|
618
|
893 gdImageDestroy(src);
|
|
|
894 break;
|
|
|
895 }
|
|
|
896 }
|
|
|
897
|
|
484
|
898 if (conf->filter == NGX_HTTP_IMAGE_CROP) {
|
|
|
899
|
|
|
900 src = dst;
|
|
|
901
|
|
510
|
902 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
903 ox = dx - ctx->max_width;
|
|
484
|
904
|
|
|
905 } else {
|
|
|
906 ox = 0;
|
|
|
907 }
|
|
|
908
|
|
510
|
909 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
910 oy = dy - ctx->max_height;
|
|
484
|
911
|
|
|
912 } else {
|
|
|
913 oy = 0;
|
|
|
914 }
|
|
|
915
|
|
|
916 if (ox || oy) {
|
|
|
917
|
|
|
918 dst = ngx_http_image_new(r, dx - ox, dy - oy, colors);
|
|
|
919
|
|
|
920 if (dst == NULL) {
|
|
|
921 gdImageDestroy(src);
|
|
|
922 return NULL;
|
|
|
923 }
|
|
|
924
|
|
|
925 ox /= 2;
|
|
|
926 oy /= 2;
|
|
|
927
|
|
|
928 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
929 "image crop: %d x %d @ %d x %d",
|
|
|
930 dx, dy, ox, oy);
|
|
|
931
|
|
528
|
932 if (colors == 0) {
|
|
|
933 gdImageSaveAlpha(dst, 1);
|
|
|
934 gdImageAlphaBlending(dst, 0);
|
|
|
935 }
|
|
|
936
|
|
484
|
937 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy);
|
|
|
938
|
|
528
|
939 if (colors) {
|
|
|
940 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
941 }
|
|
|
942
|
|
484
|
943 gdImageDestroy(src);
|
|
|
944 }
|
|
|
945 }
|
|
|
946
|
|
526
|
947 if (transparent != -1 && colors) {
|
|
|
948 gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue));
|
|
|
949 }
|
|
484
|
950
|
|
|
951 out = ngx_http_image_out(r, ctx->type, dst, &size);
|
|
|
952
|
|
|
953 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
954 "image: %d x %d %d", sx, sy, colors);
|
|
|
955
|
|
|
956 gdImageDestroy(dst);
|
|
|
957 ngx_pfree(r->pool, ctx->image);
|
|
|
958
|
|
|
959 if (out == NULL) {
|
|
|
960 return NULL;
|
|
|
961 }
|
|
|
962
|
|
|
963 cln = ngx_pool_cleanup_add(r->pool, 0);
|
|
|
964 if (cln == NULL) {
|
|
|
965 gdFree(out);
|
|
|
966 return NULL;
|
|
|
967 }
|
|
|
968
|
|
|
969 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
970 if (b == NULL) {
|
|
|
971 gdFree(out);
|
|
|
972 return NULL;
|
|
|
973 }
|
|
|
974
|
|
|
975 cln->handler = ngx_http_image_cleanup;
|
|
|
976 cln->data = out;
|
|
|
977
|
|
|
978 b->pos = out;
|
|
|
979 b->last = out + size;
|
|
|
980 b->memory = 1;
|
|
|
981 b->last_buf = 1;
|
|
|
982
|
|
|
983 ngx_http_image_length(r, b);
|
|
|
984
|
|
|
985 return b;
|
|
|
986 }
|
|
|
987
|
|
|
988
|
|
|
989 static gdImagePtr
|
|
|
990 ngx_http_image_source(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
991 {
|
|
|
992 char *failed;
|
|
|
993 gdImagePtr img;
|
|
|
994
|
|
|
995 img = NULL;
|
|
|
996
|
|
|
997 switch (ctx->type) {
|
|
|
998
|
|
|
999 case NGX_HTTP_IMAGE_JPEG:
|
|
|
1000 img = gdImageCreateFromJpegPtr(ctx->length, ctx->image);
|
|
|
1001 failed = "gdImageCreateFromJpegPtr() failed";
|
|
|
1002 break;
|
|
|
1003
|
|
|
1004 case NGX_HTTP_IMAGE_GIF:
|
|
|
1005 img = gdImageCreateFromGifPtr(ctx->length, ctx->image);
|
|
|
1006 failed = "gdImageCreateFromGifPtr() failed";
|
|
|
1007 break;
|
|
|
1008
|
|
|
1009 case NGX_HTTP_IMAGE_PNG:
|
|
|
1010 img = gdImageCreateFromPngPtr(ctx->length, ctx->image);
|
|
|
1011 failed = "gdImageCreateFromPngPtr() failed";
|
|
|
1012 break;
|
|
|
1013
|
|
|
1014 default:
|
|
|
1015 failed = "unknown image type";
|
|
|
1016 break;
|
|
|
1017 }
|
|
|
1018
|
|
|
1019 if (img == NULL) {
|
|
|
1020 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
1021 }
|
|
|
1022
|
|
|
1023 return img;
|
|
|
1024 }
|
|
|
1025
|
|
|
1026
|
|
|
1027 static gdImagePtr
|
|
|
1028 ngx_http_image_new(ngx_http_request_t *r, int w, int h, int colors)
|
|
|
1029 {
|
|
|
1030 gdImagePtr img;
|
|
|
1031
|
|
|
1032 if (colors == 0) {
|
|
|
1033 img = gdImageCreateTrueColor(w, h);
|
|
|
1034
|
|
|
1035 if (img == NULL) {
|
|
|
1036 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1037 "gdImageCreateTrueColor() failed");
|
|
|
1038 return NULL;
|
|
|
1039 }
|
|
|
1040
|
|
|
1041 } else {
|
|
|
1042 img = gdImageCreate(w, h);
|
|
|
1043
|
|
|
1044 if (img == NULL) {
|
|
|
1045 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1046 "gdImageCreate() failed");
|
|
|
1047 return NULL;
|
|
|
1048 }
|
|
|
1049 }
|
|
|
1050
|
|
|
1051 return img;
|
|
|
1052 }
|
|
|
1053
|
|
|
1054
|
|
|
1055 static u_char *
|
|
|
1056 ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, gdImagePtr img,
|
|
|
1057 int *size)
|
|
|
1058 {
|
|
492
|
1059 char *failed;
|
|
|
1060 u_char *out;
|
|
594
|
1061 ngx_int_t jq;
|
|
492
|
1062 ngx_http_image_filter_conf_t *conf;
|
|
484
|
1063
|
|
|
1064 out = NULL;
|
|
|
1065
|
|
|
1066 switch (type) {
|
|
|
1067
|
|
|
1068 case NGX_HTTP_IMAGE_JPEG:
|
|
492
|
1069 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
594
|
1070
|
|
|
1071 jq = ngx_http_image_filter_get_value(r, conf->jqcv, conf->jpeg_quality);
|
|
|
1072 if (jq <= 0) {
|
|
|
1073 return NULL;
|
|
|
1074 }
|
|
|
1075
|
|
|
1076 out = gdImageJpegPtr(img, size, jq);
|
|
484
|
1077 failed = "gdImageJpegPtr() failed";
|
|
|
1078 break;
|
|
|
1079
|
|
|
1080 case NGX_HTTP_IMAGE_GIF:
|
|
|
1081 out = gdImageGifPtr(img, size);
|
|
|
1082 failed = "gdImageGifPtr() failed";
|
|
|
1083 break;
|
|
|
1084
|
|
|
1085 case NGX_HTTP_IMAGE_PNG:
|
|
|
1086 out = gdImagePngPtr(img, size);
|
|
|
1087 failed = "gdImagePngPtr() failed";
|
|
|
1088 break;
|
|
|
1089
|
|
|
1090 default:
|
|
|
1091 failed = "unknown image type";
|
|
|
1092 break;
|
|
|
1093 }
|
|
|
1094
|
|
|
1095 if (out == NULL) {
|
|
|
1096 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
1097 }
|
|
|
1098
|
|
|
1099 return out;
|
|
|
1100 }
|
|
|
1101
|
|
|
1102
|
|
|
1103 static void
|
|
|
1104 ngx_http_image_cleanup(void *data)
|
|
|
1105 {
|
|
|
1106 gdFree(data);
|
|
|
1107 }
|
|
|
1108
|
|
|
1109
|
|
510
|
1110 static ngx_uint_t
|
|
|
1111 ngx_http_image_filter_get_value(ngx_http_request_t *r,
|
|
|
1112 ngx_http_complex_value_t *cv, ngx_uint_t v)
|
|
|
1113 {
|
|
|
1114 ngx_str_t val;
|
|
|
1115
|
|
|
1116 if (cv == NULL) {
|
|
|
1117 return v;
|
|
|
1118 }
|
|
|
1119
|
|
|
1120 if (ngx_http_complex_value(r, cv, &val) != NGX_OK) {
|
|
|
1121 return 0;
|
|
|
1122 }
|
|
|
1123
|
|
|
1124 return ngx_http_image_filter_value(&val);
|
|
|
1125 }
|
|
|
1126
|
|
|
1127
|
|
|
1128 static ngx_uint_t
|
|
|
1129 ngx_http_image_filter_value(ngx_str_t *value)
|
|
|
1130 {
|
|
|
1131 ngx_int_t n;
|
|
|
1132
|
|
|
1133 if (value->len == 1 && value->data[0] == '-') {
|
|
|
1134 return (ngx_uint_t) -1;
|
|
|
1135 }
|
|
|
1136
|
|
|
1137 n = ngx_atoi(value->data, value->len);
|
|
|
1138
|
|
|
1139 if (n > 0) {
|
|
|
1140 return (ngx_uint_t) n;
|
|
|
1141 }
|
|
|
1142
|
|
|
1143 return 0;
|
|
|
1144 }
|
|
|
1145
|
|
|
1146
|
|
484
|
1147 static void *
|
|
|
1148 ngx_http_image_filter_create_conf(ngx_conf_t *cf)
|
|
|
1149 {
|
|
|
1150 ngx_http_image_filter_conf_t *conf;
|
|
|
1151
|
|
|
1152 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t));
|
|
|
1153 if (conf == NULL) {
|
|
496
|
1154 return NULL;
|
|
484
|
1155 }
|
|
|
1156
|
|
|
1157 conf->filter = NGX_CONF_UNSET_UINT;
|
|
594
|
1158 conf->jpeg_quality = NGX_CONF_UNSET_UINT;
|
|
618
|
1159 conf->angle = NGX_CONF_UNSET_UINT;
|
|
528
|
1160 conf->transparency = NGX_CONF_UNSET;
|
|
484
|
1161 conf->buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
1162
|
|
|
1163 return conf;
|
|
|
1164 }
|
|
|
1165
|
|
|
1166
|
|
|
1167 static char *
|
|
|
1168 ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1169 {
|
|
|
1170 ngx_http_image_filter_conf_t *prev = parent;
|
|
|
1171 ngx_http_image_filter_conf_t *conf = child;
|
|
|
1172
|
|
|
1173 if (conf->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1174
|
|
|
1175 if (prev->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1176 conf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1177
|
|
|
1178 } else {
|
|
|
1179 conf->filter = prev->filter;
|
|
|
1180 conf->width = prev->width;
|
|
|
1181 conf->height = prev->height;
|
|
510
|
1182 conf->wcv = prev->wcv;
|
|
|
1183 conf->hcv = prev->hcv;
|
|
484
|
1184 }
|
|
|
1185 }
|
|
|
1186
|
|
492
|
1187 /* 75 is libjpeg default quality */
|
|
594
|
1188 ngx_conf_merge_uint_value(conf->jpeg_quality, prev->jpeg_quality, 75);
|
|
|
1189
|
|
|
1190 if (conf->jqcv == NULL) {
|
|
|
1191 conf->jqcv = prev->jqcv;
|
|
|
1192 }
|
|
492
|
1193
|
|
618
|
1194 ngx_conf_merge_uint_value(conf->angle, prev->angle, 0);
|
|
|
1195 if (conf->acv == NULL) {
|
|
|
1196 conf->acv = prev->acv;
|
|
|
1197 }
|
|
|
1198
|
|
528
|
1199 ngx_conf_merge_value(conf->transparency, prev->transparency, 1);
|
|
|
1200
|
|
484
|
1201 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
|
|
|
1202 1 * 1024 * 1024);
|
|
|
1203
|
|
|
1204 return NGX_CONF_OK;
|
|
|
1205 }
|
|
|
1206
|
|
|
1207
|
|
|
1208 static char *
|
|
|
1209 ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
1210 {
|
|
|
1211 ngx_http_image_filter_conf_t *imcf = conf;
|
|
|
1212
|
|
510
|
1213 ngx_str_t *value;
|
|
|
1214 ngx_int_t n;
|
|
|
1215 ngx_uint_t i;
|
|
|
1216 ngx_http_complex_value_t cv;
|
|
|
1217 ngx_http_compile_complex_value_t ccv;
|
|
484
|
1218
|
|
|
1219 value = cf->args->elts;
|
|
|
1220
|
|
|
1221 i = 1;
|
|
|
1222
|
|
|
1223 if (cf->args->nelts == 2) {
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|
|
1224 if (ngx_strcmp(value[i].data, "off") == 0) {
|
|
|
1225 imcf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1226
|
|
|
1227 } else if (ngx_strcmp(value[i].data, "test") == 0) {
|
|
|
1228 imcf->filter = NGX_HTTP_IMAGE_TEST;
|
|
|
1229
|
|
|
1230 } else if (ngx_strcmp(value[i].data, "size") == 0) {
|
|
|
1231 imcf->filter = NGX_HTTP_IMAGE_SIZE;
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|
|
1232
|
|
|
1233 } else {
|
|
|
1234 goto failed;
|
|
|
1235 }
|
|
|
1236
|
|
|
1237 return NGX_CONF_OK;
|
|
618
|
1238
|
|
|
1239 } else if (cf->args->nelts == 3) {
|
|
|
1240
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|
|
1241 if (ngx_strcmp(value[i].data, "rotate") == 0) {
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|
|
1242 imcf->filter = NGX_HTTP_IMAGE_ROTATE;
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|
|
1243
|
|
|
1244 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1245
|
|
|
1246 ccv.cf = cf;
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|
|
1247 ccv.value = &value[++i];
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|
|
1248 ccv.complex_value = &cv;
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|
|
1249
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|
|
1250 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
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|
|
1251 return NGX_CONF_ERROR;
|
|
|
1252 }
|
|
|
1253
|
|
|
1254 if (cv.lengths == NULL) {
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|
|
1255 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1256
|
|
|
1257 if (n != 90 && n != 180 && n != 270) {
|
|
|
1258 goto failed;
|
|
|
1259 }
|
|
|
1260
|
|
|
1261 imcf->angle = (ngx_uint_t) n;
|
|
|
1262
|
|
|
1263 } else {
|
|
|
1264 imcf->acv = ngx_palloc(cf->pool,
|
|
|
1265 sizeof(ngx_http_complex_value_t));
|
|
|
1266 if (imcf->acv == NULL) {
|
|
|
1267 return NGX_CONF_ERROR;
|
|
|
1268 }
|
|
|
1269
|
|
|
1270 *imcf->acv = cv;
|
|
|
1271 }
|
|
|
1272
|
|
|
1273 return NGX_CONF_OK;
|
|
|
1274
|
|
|
1275 } else {
|
|
|
1276 goto failed;
|
|
|
1277 }
|
|
484
|
1278 }
|
|
|
1279
|
|
|
1280 if (ngx_strcmp(value[i].data, "resize") == 0) {
|
|
|
1281 imcf->filter = NGX_HTTP_IMAGE_RESIZE;
|
|
|
1282
|
|
|
1283 } else if (ngx_strcmp(value[i].data, "crop") == 0) {
|
|
|
1284 imcf->filter = NGX_HTTP_IMAGE_CROP;
|
|
|
1285
|
|
|
1286 } else {
|
|
|
1287 goto failed;
|
|
|
1288 }
|
|
|
1289
|
|
510
|
1290 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1291
|
|
|
1292 ccv.cf = cf;
|
|
|
1293 ccv.value = &value[++i];
|
|
|
1294 ccv.complex_value = &cv;
|
|
484
|
1295
|
|
510
|
1296 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1297 return NGX_CONF_ERROR;
|
|
|
1298 }
|
|
484
|
1299
|
|
510
|
1300 if (cv.lengths == NULL) {
|
|
|
1301 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1302
|
|
|
1303 if (n == 0) {
|
|
484
|
1304 goto failed;
|
|
|
1305 }
|
|
|
1306
|
|
|
1307 imcf->width = (ngx_uint_t) n;
|
|
510
|
1308
|
|
|
1309 } else {
|
|
|
1310 imcf->wcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1311 if (imcf->wcv == NULL) {
|
|
|
1312 return NGX_CONF_ERROR;
|
|
|
1313 }
|
|
|
1314
|
|
|
1315 *imcf->wcv = cv;
|
|
484
|
1316 }
|
|
|
1317
|
|
510
|
1318 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1319
|
|
|
1320 ccv.cf = cf;
|
|
|
1321 ccv.value = &value[++i];
|
|
|
1322 ccv.complex_value = &cv;
|
|
484
|
1323
|
|
510
|
1324 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1325 return NGX_CONF_ERROR;
|
|
|
1326 }
|
|
484
|
1327
|
|
510
|
1328 if (cv.lengths == NULL) {
|
|
|
1329 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1330
|
|
|
1331 if (n == 0) {
|
|
484
|
1332 goto failed;
|
|
|
1333 }
|
|
|
1334
|
|
|
1335 imcf->height = (ngx_uint_t) n;
|
|
510
|
1336
|
|
|
1337 } else {
|
|
|
1338 imcf->hcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1339 if (imcf->hcv == NULL) {
|
|
|
1340 return NGX_CONF_ERROR;
|
|
|
1341 }
|
|
|
1342
|
|
|
1343 *imcf->hcv = cv;
|
|
484
|
1344 }
|
|
|
1345
|
|
|
1346 return NGX_CONF_OK;
|
|
|
1347
|
|
|
1348 failed:
|
|
|
1349
|
|
|
1350 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"",
|
|
|
1351 &value[i]);
|
|
|
1352
|
|
|
1353 return NGX_CONF_ERROR;
|
|
|
1354 }
|
|
|
1355
|
|
|
1356
|
|
594
|
1357 static char *
|
|
|
1358 ngx_http_image_filter_jpeg_quality(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
1359 void *conf)
|
|
|
1360 {
|
|
|
1361 ngx_http_image_filter_conf_t *imcf = conf;
|
|
|
1362
|
|
|
1363 ngx_str_t *value;
|
|
|
1364 ngx_int_t n;
|
|
|
1365 ngx_http_complex_value_t cv;
|
|
|
1366 ngx_http_compile_complex_value_t ccv;
|
|
|
1367
|
|
|
1368 value = cf->args->elts;
|
|
|
1369
|
|
|
1370 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1371
|
|
|
1372 ccv.cf = cf;
|
|
|
1373 ccv.value = &value[1];
|
|
|
1374 ccv.complex_value = &cv;
|
|
|
1375
|
|
|
1376 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1377 return NGX_CONF_ERROR;
|
|
|
1378 }
|
|
|
1379
|
|
|
1380 if (cv.lengths == NULL) {
|
|
|
1381 n = ngx_http_image_filter_value(&value[1]);
|
|
|
1382
|
|
|
1383 if (n <= 0) {
|
|
|
1384 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
1385 "invalid parameter \"%V\"", &value[1]);
|
|
|
1386 return NGX_CONF_ERROR;
|
|
|
1387 }
|
|
|
1388
|
|
|
1389 imcf->jpeg_quality = (ngx_uint_t) n;
|
|
|
1390
|
|
|
1391 } else {
|
|
|
1392 imcf->jqcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1393 if (imcf->jqcv == NULL) {
|
|
|
1394 return NGX_CONF_ERROR;
|
|
|
1395 }
|
|
|
1396
|
|
|
1397 *imcf->jqcv = cv;
|
|
|
1398 }
|
|
|
1399
|
|
|
1400 return NGX_CONF_OK;
|
|
|
1401 }
|
|
|
1402
|
|
|
1403
|
|
484
|
1404 static ngx_int_t
|
|
|
1405 ngx_http_image_filter_init(ngx_conf_t *cf)
|
|
|
1406 {
|
|
|
1407 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1408 ngx_http_top_header_filter = ngx_http_image_header_filter;
|
|
|
1409
|
|
|
1410 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1411 ngx_http_top_body_filter = ngx_http_image_body_filter;
|
|
|
1412
|
|
|
1413 return NGX_OK;
|
|
|
1414 }
|
