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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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648
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44 ngx_uint_t sharpen;
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45
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46 ngx_flag_t transparency;
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47
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510
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48 ngx_http_complex_value_t *wcv;
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49 ngx_http_complex_value_t *hcv;
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618
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50 ngx_http_complex_value_t *acv;
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594
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51 ngx_http_complex_value_t *jqcv;
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52 ngx_http_complex_value_t *shcv;
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53
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484
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54 size_t buffer_size;
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55 } ngx_http_image_filter_conf_t;
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56
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57
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58 typedef struct {
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59 u_char *image;
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60 u_char *last;
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61
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62 size_t length;
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63
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64 ngx_uint_t width;
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65 ngx_uint_t height;
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510
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66 ngx_uint_t max_width;
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67 ngx_uint_t max_height;
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618
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68 ngx_uint_t angle;
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510
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69
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70 ngx_uint_t phase;
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71 ngx_uint_t type;
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558
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72 ngx_uint_t force;
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484
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73 } ngx_http_image_filter_ctx_t;
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74
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75
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488
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76 static ngx_int_t ngx_http_image_send(ngx_http_request_t *r,
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77 ngx_http_image_filter_ctx_t *ctx, ngx_chain_t *in);
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484
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78 static ngx_uint_t ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in);
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79 static ngx_int_t ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in);
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80 static ngx_buf_t *ngx_http_image_process(ngx_http_request_t *r);
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81 static ngx_buf_t *ngx_http_image_json(ngx_http_request_t *r,
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82 ngx_http_image_filter_ctx_t *ctx);
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83 static ngx_buf_t *ngx_http_image_asis(ngx_http_request_t *r,
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84 ngx_http_image_filter_ctx_t *ctx);
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85 static void ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b);
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86 static ngx_int_t ngx_http_image_size(ngx_http_request_t *r,
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87 ngx_http_image_filter_ctx_t *ctx);
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88
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89 static ngx_buf_t *ngx_http_image_resize(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_source(ngx_http_request_t *r,
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92 ngx_http_image_filter_ctx_t *ctx);
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93 static gdImagePtr ngx_http_image_new(ngx_http_request_t *r, int w, int h,
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94 int colors);
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95 static u_char *ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type,
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96 gdImagePtr img, int *size);
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97 static void ngx_http_image_cleanup(void *data);
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510
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98 static ngx_uint_t ngx_http_image_filter_get_value(ngx_http_request_t *r,
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99 ngx_http_complex_value_t *cv, ngx_uint_t v);
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100 static ngx_uint_t ngx_http_image_filter_value(ngx_str_t *value);
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484
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101
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102
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103 static void *ngx_http_image_filter_create_conf(ngx_conf_t *cf);
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104 static char *ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent,
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105 void *child);
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106 static char *ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd,
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107 void *conf);
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594
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108 static char *ngx_http_image_filter_jpeg_quality(ngx_conf_t *cf,
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109 ngx_command_t *cmd, void *conf);
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648
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110 static char *ngx_http_image_filter_sharpen(ngx_conf_t *cf, ngx_command_t *cmd,
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111 void *conf);
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484
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112 static ngx_int_t ngx_http_image_filter_init(ngx_conf_t *cf);
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113
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114
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115 static ngx_command_t ngx_http_image_filter_commands[] = {
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116
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117 { ngx_string("image_filter"),
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618
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118 NGX_HTTP_LOC_CONF|NGX_CONF_TAKE13|NGX_CONF_TAKE2,
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119 ngx_http_image_filter,
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120 NGX_HTTP_LOC_CONF_OFFSET,
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121 0,
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122 NULL },
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123
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492
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124 { ngx_string("image_filter_jpeg_quality"),
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125 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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594
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126 ngx_http_image_filter_jpeg_quality,
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492
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127 NGX_HTTP_LOC_CONF_OFFSET,
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128 0,
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492
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129 NULL },
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130
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648
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131 { ngx_string("image_filter_sharpen"),
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132 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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133 ngx_http_image_filter_sharpen,
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134 NGX_HTTP_LOC_CONF_OFFSET,
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135 0,
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136 NULL },
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137
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528
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138 { ngx_string("image_filter_transparency"),
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139 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
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140 ngx_conf_set_flag_slot,
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141 NGX_HTTP_LOC_CONF_OFFSET,
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142 offsetof(ngx_http_image_filter_conf_t, transparency),
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143 NULL },
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144
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484
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145 { ngx_string("image_filter_buffer"),
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146 NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
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147 ngx_conf_set_size_slot,
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148 NGX_HTTP_LOC_CONF_OFFSET,
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149 offsetof(ngx_http_image_filter_conf_t, buffer_size),
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150 NULL },
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151
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152 ngx_null_command
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153 };
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154
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155
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156 static ngx_http_module_t ngx_http_image_filter_module_ctx = {
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157 NULL, /* preconfiguration */
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158 ngx_http_image_filter_init, /* postconfiguration */
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159
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160 NULL, /* create main configuration */
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161 NULL, /* init main configuration */
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162
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163 NULL, /* create server configuration */
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164 NULL, /* merge server configuration */
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165
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166 ngx_http_image_filter_create_conf, /* create location configuration */
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167 ngx_http_image_filter_merge_conf /* merge location configuration */
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168 };
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169
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170
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171 ngx_module_t ngx_http_image_filter_module = {
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172 NGX_MODULE_V1,
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173 &ngx_http_image_filter_module_ctx, /* module context */
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174 ngx_http_image_filter_commands, /* module directives */
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175 NGX_HTTP_MODULE, /* module type */
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176 NULL, /* init master */
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177 NULL, /* init module */
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178 NULL, /* init process */
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179 NULL, /* init thread */
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180 NULL, /* exit thread */
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181 NULL, /* exit process */
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182 NULL, /* exit master */
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183 NGX_MODULE_V1_PADDING
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184 };
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185
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186
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187 static ngx_http_output_header_filter_pt ngx_http_next_header_filter;
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188 static ngx_http_output_body_filter_pt ngx_http_next_body_filter;
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189
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190
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191 static ngx_str_t ngx_http_image_types[] = {
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192 ngx_string("image/jpeg"),
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193 ngx_string("image/gif"),
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194 ngx_string("image/png")
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195 };
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196
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197
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198 static ngx_int_t
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199 ngx_http_image_header_filter(ngx_http_request_t *r)
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200 {
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201 off_t len;
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202 ngx_http_image_filter_ctx_t *ctx;
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203 ngx_http_image_filter_conf_t *conf;
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204
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205 if (r->headers_out.status == NGX_HTTP_NOT_MODIFIED) {
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206 return ngx_http_next_header_filter(r);
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207 }
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208
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490
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209 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
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210
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211 if (ctx) {
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212 ngx_http_set_ctx(r, NULL, ngx_http_image_filter_module);
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213 return ngx_http_next_header_filter(r);
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214 }
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215
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484
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216 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
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217
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218 if (conf->filter == NGX_HTTP_IMAGE_OFF) {
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219 return ngx_http_next_header_filter(r);
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220 }
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221
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222 if (r->headers_out.content_type.len
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223 >= sizeof("multipart/x-mixed-replace") - 1
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224 && ngx_strncasecmp(r->headers_out.content_type.data,
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225 (u_char *) "multipart/x-mixed-replace",
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226 sizeof("multipart/x-mixed-replace") - 1)
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227 == 0)
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228 {
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229 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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230 "image filter: multipart/x-mixed-replace response");
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231
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232 return NGX_ERROR;
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233 }
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234
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235 ctx = ngx_pcalloc(r->pool, sizeof(ngx_http_image_filter_ctx_t));
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236 if (ctx == NULL) {
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237 return NGX_ERROR;
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238 }
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239
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240 ngx_http_set_ctx(r, ctx, ngx_http_image_filter_module);
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241
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242 len = r->headers_out.content_length_n;
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243
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486
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244 if (len != -1 && len > (off_t) conf->buffer_size) {
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484
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245 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
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246 "image filter: too big response: %O", len);
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247
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592
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248 return NGX_HTTP_UNSUPPORTED_MEDIA_TYPE;
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484
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249 }
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250
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251 if (len == -1) {
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252 ctx->length = conf->buffer_size;
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253
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254 } else {
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255 ctx->length = (size_t) len;
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256 }
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257
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258 if (r->headers_out.refresh) {
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259 r->headers_out.refresh->hash = 0;
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260 }
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261
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262 r->main_filter_need_in_memory = 1;
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263 r->allow_ranges = 0;
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264
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265 return NGX_OK;
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266 }
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267
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268
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269 static ngx_int_t
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270 ngx_http_image_body_filter(ngx_http_request_t *r, ngx_chain_t *in)
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271 {
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272 ngx_int_t rc;
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273 ngx_str_t *ct;
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274 ngx_chain_t out;
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275 ngx_http_image_filter_ctx_t *ctx;
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276 ngx_http_image_filter_conf_t *conf;
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277
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278 ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0, "image filter");
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279
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280 if (in == NULL) {
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281 return ngx_http_next_body_filter(r, in);
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282 }
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283
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284 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
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285
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286 if (ctx == NULL) {
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287 return ngx_http_next_body_filter(r, in);
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288 }
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289
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290 switch (ctx->phase) {
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291
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292 case NGX_HTTP_IMAGE_START:
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293
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294 ctx->type = ngx_http_image_test(r, in);
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295
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296 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
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297
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298 if (ctx->type == NGX_HTTP_IMAGE_NONE) {
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299
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300 if (conf->filter == NGX_HTTP_IMAGE_SIZE) {
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301 out.buf = ngx_http_image_json(r, NULL);
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302
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303 if (out.buf) {
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304 out.next = NULL;
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488
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305 ctx->phase = NGX_HTTP_IMAGE_DONE;
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306
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488
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307 return ngx_http_image_send(r, ctx, &out);
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484
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308 }
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309 }
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310
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311 return ngx_http_filter_finalize_request(r,
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488
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312 &ngx_http_image_filter_module,
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484
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313 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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314 }
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315
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316 /* override content type */
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317
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318 ct = &ngx_http_image_types[ctx->type - 1];
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319 r->headers_out.content_type_len = ct->len;
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320 r->headers_out.content_type = *ct;
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494
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321 r->headers_out.content_type_lowcase = NULL;
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484
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322
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323 if (conf->filter == NGX_HTTP_IMAGE_TEST) {
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488
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324 ctx->phase = NGX_HTTP_IMAGE_PASS;
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325
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326 return ngx_http_image_send(r, ctx, in);
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484
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327 }
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328
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329 ctx->phase = NGX_HTTP_IMAGE_READ;
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330
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331 /* fall through */
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332
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333 case NGX_HTTP_IMAGE_READ:
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334
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335 rc = ngx_http_image_read(r, in);
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336
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337 if (rc == NGX_AGAIN) {
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338 return NGX_OK;
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339 }
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340
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341 if (rc == NGX_ERROR) {
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342 return ngx_http_filter_finalize_request(r,
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488
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343 &ngx_http_image_filter_module,
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484
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344 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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345 }
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346
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347 /* fall through */
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348
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349 case NGX_HTTP_IMAGE_PROCESS:
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350
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351 out.buf = ngx_http_image_process(r);
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352
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353 if (out.buf == NULL) {
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354 return ngx_http_filter_finalize_request(r,
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488
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355 &ngx_http_image_filter_module,
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484
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356 NGX_HTTP_UNSUPPORTED_MEDIA_TYPE);
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357 }
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358
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359 out.next = NULL;
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488
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360 ctx->phase = NGX_HTTP_IMAGE_PASS;
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361
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362 return ngx_http_image_send(r, ctx, &out);
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484
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363
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488
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364 case NGX_HTTP_IMAGE_PASS:
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365
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366 return ngx_http_next_body_filter(r, in);
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484
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367
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368 default: /* NGX_HTTP_IMAGE_DONE */
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369
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488
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370 rc = ngx_http_next_body_filter(r, NULL);
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371
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372 /* NGX_ERROR resets any pending data */
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373 return (rc == NGX_OK) ? NGX_ERROR : rc;
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484
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374 }
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488
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375 }
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484
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376
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488
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377
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378 static ngx_int_t
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379 ngx_http_image_send(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx,
|
|
|
380 ngx_chain_t *in)
|
|
|
381 {
|
|
|
382 ngx_int_t rc;
|
|
484
|
383
|
|
|
384 rc = ngx_http_next_header_filter(r);
|
|
|
385
|
|
|
386 if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
|
|
488
|
387 return NGX_ERROR;
|
|
484
|
388 }
|
|
|
389
|
|
488
|
390 rc = ngx_http_next_body_filter(r, in);
|
|
|
391
|
|
|
392 if (ctx->phase == NGX_HTTP_IMAGE_DONE) {
|
|
|
393 /* NGX_ERROR resets any pending data */
|
|
|
394 return (rc == NGX_OK) ? NGX_ERROR : rc;
|
|
|
395 }
|
|
|
396
|
|
|
397 return rc;
|
|
484
|
398 }
|
|
|
399
|
|
|
400
|
|
|
401 static ngx_uint_t
|
|
|
402 ngx_http_image_test(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
403 {
|
|
|
404 u_char *p;
|
|
|
405
|
|
|
406 p = in->buf->pos;
|
|
|
407
|
|
|
408 if (in->buf->last - p < 16) {
|
|
|
409 return NGX_HTTP_IMAGE_NONE;
|
|
|
410 }
|
|
|
411
|
|
|
412 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
413 "image filter: \"%c%c\"", p[0], p[1]);
|
|
|
414
|
|
|
415 if (p[0] == 0xff && p[1] == 0xd8) {
|
|
|
416
|
|
|
417 /* JPEG */
|
|
|
418
|
|
|
419 return NGX_HTTP_IMAGE_JPEG;
|
|
|
420
|
|
|
421 } else if (p[0] == 'G' && p[1] == 'I' && p[2] == 'F' && p[3] == '8'
|
|
498
|
422 && p[5] == 'a')
|
|
484
|
423 {
|
|
498
|
424 if (p[4] == '9' || p[4] == '7') {
|
|
|
425 /* GIF */
|
|
|
426 return NGX_HTTP_IMAGE_GIF;
|
|
|
427 }
|
|
484
|
428
|
|
|
429 } else if (p[0] == 0x89 && p[1] == 'P' && p[2] == 'N' && p[3] == 'G'
|
|
|
430 && p[4] == 0x0d && p[5] == 0x0a && p[6] == 0x1a && p[7] == 0x0a)
|
|
|
431 {
|
|
|
432 /* PNG */
|
|
|
433
|
|
|
434 return NGX_HTTP_IMAGE_PNG;
|
|
|
435 }
|
|
|
436
|
|
|
437 return NGX_HTTP_IMAGE_NONE;
|
|
|
438 }
|
|
|
439
|
|
|
440
|
|
|
441 static ngx_int_t
|
|
|
442 ngx_http_image_read(ngx_http_request_t *r, ngx_chain_t *in)
|
|
|
443 {
|
|
|
444 u_char *p;
|
|
|
445 size_t size, rest;
|
|
|
446 ngx_buf_t *b;
|
|
|
447 ngx_chain_t *cl;
|
|
|
448 ngx_http_image_filter_ctx_t *ctx;
|
|
|
449
|
|
|
450 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
|
|
|
451
|
|
|
452 if (ctx->image == NULL) {
|
|
|
453 ctx->image = ngx_palloc(r->pool, ctx->length);
|
|
|
454 if (ctx->image == NULL) {
|
|
|
455 return NGX_ERROR;
|
|
|
456 }
|
|
|
457
|
|
|
458 ctx->last = ctx->image;
|
|
|
459 }
|
|
|
460
|
|
|
461 p = ctx->last;
|
|
|
462
|
|
|
463 for (cl = in; cl; cl = cl->next) {
|
|
|
464
|
|
|
465 b = cl->buf;
|
|
|
466 size = b->last - b->pos;
|
|
|
467
|
|
|
468 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
469 "image buf: %uz", size);
|
|
|
470
|
|
|
471 rest = ctx->image + ctx->length - p;
|
|
|
472 size = (rest < size) ? rest : size;
|
|
|
473
|
|
|
474 p = ngx_cpymem(p, b->pos, size);
|
|
|
475 b->pos += size;
|
|
|
476
|
|
|
477 if (b->last_buf) {
|
|
|
478 ctx->last = p;
|
|
|
479 return NGX_OK;
|
|
|
480 }
|
|
|
481 }
|
|
|
482
|
|
|
483 ctx->last = p;
|
|
|
484 r->connection->buffered |= NGX_HTTP_IMAGE_BUFFERED;
|
|
|
485
|
|
|
486 return NGX_AGAIN;
|
|
|
487 }
|
|
|
488
|
|
|
489
|
|
|
490 static ngx_buf_t *
|
|
|
491 ngx_http_image_process(ngx_http_request_t *r)
|
|
|
492 {
|
|
|
493 ngx_int_t rc;
|
|
|
494 ngx_http_image_filter_ctx_t *ctx;
|
|
|
495 ngx_http_image_filter_conf_t *conf;
|
|
|
496
|
|
|
497 r->connection->buffered &= ~NGX_HTTP_IMAGE_BUFFERED;
|
|
|
498
|
|
|
499 ctx = ngx_http_get_module_ctx(r, ngx_http_image_filter_module);
|
|
|
500
|
|
|
501 rc = ngx_http_image_size(r, ctx);
|
|
|
502
|
|
|
503 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
504
|
|
|
505 if (conf->filter == NGX_HTTP_IMAGE_SIZE) {
|
|
510
|
506 return ngx_http_image_json(r, rc == NGX_OK ? ctx : NULL);
|
|
|
507 }
|
|
484
|
508
|
|
618
|
509 ctx->angle = ngx_http_image_filter_get_value(r, conf->acv, conf->angle);
|
|
|
510
|
|
|
511 if (conf->filter == NGX_HTTP_IMAGE_ROTATE) {
|
|
|
512
|
|
|
513 if (ctx->angle != 90 && ctx->angle != 180 && ctx->angle != 270) {
|
|
|
514 return NULL;
|
|
|
515 }
|
|
|
516
|
|
|
517 return ngx_http_image_resize(r, ctx);
|
|
|
518 }
|
|
|
519
|
|
510
|
520 ctx->max_width = ngx_http_image_filter_get_value(r, conf->wcv, conf->width);
|
|
|
521 if (ctx->max_width == 0) {
|
|
|
522 return NULL;
|
|
484
|
523 }
|
|
|
524
|
|
510
|
525 ctx->max_height = ngx_http_image_filter_get_value(r, conf->hcv,
|
|
|
526 conf->height);
|
|
|
527 if (ctx->max_height == 0) {
|
|
|
528 return NULL;
|
|
|
529 }
|
|
|
530
|
|
|
531 if (rc == NGX_OK
|
|
|
532 && ctx->width <= ctx->max_width
|
|
558
|
533 && ctx->height <= ctx->max_height
|
|
618
|
534 && ctx->angle == 0
|
|
558
|
535 && !ctx->force)
|
|
510
|
536 {
|
|
|
537 return ngx_http_image_asis(r, ctx);
|
|
|
538 }
|
|
|
539
|
|
|
540 return ngx_http_image_resize(r, ctx);
|
|
484
|
541 }
|
|
|
542
|
|
|
543
|
|
|
544 static ngx_buf_t *
|
|
|
545 ngx_http_image_json(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
546 {
|
|
|
547 size_t len;
|
|
|
548 ngx_buf_t *b;
|
|
|
549
|
|
|
550 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
551 if (b == NULL) {
|
|
|
552 return NULL;
|
|
|
553 }
|
|
|
554
|
|
|
555 b->memory = 1;
|
|
|
556 b->last_buf = 1;
|
|
|
557
|
|
|
558 ngx_http_clean_header(r);
|
|
|
559
|
|
|
560 r->headers_out.status = NGX_HTTP_OK;
|
|
570
|
561 ngx_str_set(&r->headers_out.content_type, "text/plain");
|
|
494
|
562 r->headers_out.content_type_lowcase = NULL;
|
|
484
|
563
|
|
|
564 if (ctx == NULL) {
|
|
|
565 b->pos = (u_char *) "{}" CRLF;
|
|
|
566 b->last = b->pos + sizeof("{}" CRLF) - 1;
|
|
|
567
|
|
|
568 ngx_http_image_length(r, b);
|
|
|
569
|
|
|
570 return b;
|
|
|
571 }
|
|
|
572
|
|
|
573 len = sizeof("{ \"img\" : "
|
|
|
574 "{ \"width\": , \"height\": , \"type\": \"jpeg\" } }" CRLF) - 1
|
|
|
575 + 2 * NGX_SIZE_T_LEN;
|
|
|
576
|
|
|
577 b->pos = ngx_pnalloc(r->pool, len);
|
|
|
578 if (b->pos == NULL) {
|
|
|
579 return NULL;
|
|
|
580 }
|
|
|
581
|
|
|
582 b->last = ngx_sprintf(b->pos,
|
|
|
583 "{ \"img\" : "
|
|
|
584 "{ \"width\": %uz,"
|
|
|
585 " \"height\": %uz,"
|
|
|
586 " \"type\": \"%s\" } }" CRLF,
|
|
|
587 ctx->width, ctx->height,
|
|
|
588 ngx_http_image_types[ctx->type - 1].data + 6);
|
|
|
589
|
|
|
590 ngx_http_image_length(r, b);
|
|
|
591
|
|
|
592 return b;
|
|
|
593 }
|
|
|
594
|
|
|
595
|
|
|
596 static ngx_buf_t *
|
|
|
597 ngx_http_image_asis(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
598 {
|
|
|
599 ngx_buf_t *b;
|
|
|
600
|
|
|
601 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
602 if (b == NULL) {
|
|
|
603 return NULL;
|
|
|
604 }
|
|
|
605
|
|
|
606 b->pos = ctx->image;
|
|
|
607 b->last = ctx->last;
|
|
|
608 b->memory = 1;
|
|
|
609 b->last_buf = 1;
|
|
|
610
|
|
|
611 ngx_http_image_length(r, b);
|
|
|
612
|
|
|
613 return b;
|
|
|
614 }
|
|
|
615
|
|
|
616
|
|
|
617 static void
|
|
|
618 ngx_http_image_length(ngx_http_request_t *r, ngx_buf_t *b)
|
|
|
619 {
|
|
|
620 r->headers_out.content_length_n = b->last - b->pos;
|
|
|
621
|
|
|
622 if (r->headers_out.content_length) {
|
|
|
623 r->headers_out.content_length->hash = 0;
|
|
|
624 }
|
|
|
625
|
|
|
626 r->headers_out.content_length = NULL;
|
|
|
627 }
|
|
|
628
|
|
|
629
|
|
|
630 static ngx_int_t
|
|
|
631 ngx_http_image_size(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
632 {
|
|
|
633 u_char *p, *last;
|
|
558
|
634 size_t len, app;
|
|
484
|
635 ngx_uint_t width, height;
|
|
|
636
|
|
|
637 p = ctx->image;
|
|
|
638
|
|
|
639 switch (ctx->type) {
|
|
|
640
|
|
|
641 case NGX_HTTP_IMAGE_JPEG:
|
|
|
642
|
|
|
643 p += 2;
|
|
|
644 last = ctx->image + ctx->length - 10;
|
|
558
|
645 width = 0;
|
|
|
646 height = 0;
|
|
|
647 app = 0;
|
|
484
|
648
|
|
|
649 while (p < last) {
|
|
|
650
|
|
|
651 if (p[0] == 0xff && p[1] != 0xff) {
|
|
|
652
|
|
|
653 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
558
|
654 "JPEG: %02xd %02xd", p[0], p[1]);
|
|
484
|
655
|
|
|
656 p++;
|
|
|
657
|
|
558
|
658 if ((*p == 0xc0 || *p == 0xc1 || *p == 0xc2 || *p == 0xc3
|
|
|
659 || *p == 0xc9 || *p == 0xca || *p == 0xcb)
|
|
|
660 && (width == 0 || height == 0))
|
|
484
|
661 {
|
|
558
|
662 width = p[6] * 256 + p[7];
|
|
|
663 height = p[4] * 256 + p[5];
|
|
484
|
664 }
|
|
|
665
|
|
|
666 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
667 "JPEG: %02xd %02xd", p[1], p[2]);
|
|
|
668
|
|
558
|
669 len = p[1] * 256 + p[2];
|
|
|
670
|
|
|
671 if (*p >= 0xe1 && *p <= 0xef) {
|
|
|
672 /* application data, e.g., EXIF, Adobe XMP, etc. */
|
|
|
673 app += len;
|
|
|
674 }
|
|
|
675
|
|
|
676 p += len;
|
|
484
|
677
|
|
|
678 continue;
|
|
|
679 }
|
|
|
680
|
|
|
681 p++;
|
|
|
682 }
|
|
|
683
|
|
558
|
684 if (width == 0 || height == 0) {
|
|
|
685 return NGX_DECLINED;
|
|
|
686 }
|
|
484
|
687
|
|
558
|
688 if (ctx->length / 20 < app) {
|
|
|
689 /* force conversion if application data consume more than 5% */
|
|
|
690 ctx->force = 1;
|
|
|
691 ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
692 "app data size: %uz", app);
|
|
|
693 }
|
|
484
|
694
|
|
|
695 break;
|
|
|
696
|
|
|
697 case NGX_HTTP_IMAGE_GIF:
|
|
|
698
|
|
|
699 if (ctx->length < 10) {
|
|
|
700 return NGX_DECLINED;
|
|
|
701 }
|
|
|
702
|
|
|
703 width = p[7] * 256 + p[6];
|
|
|
704 height = p[9] * 256 + p[8];
|
|
|
705
|
|
|
706 break;
|
|
|
707
|
|
|
708 case NGX_HTTP_IMAGE_PNG:
|
|
|
709
|
|
|
710 if (ctx->length < 24) {
|
|
|
711 return NGX_DECLINED;
|
|
|
712 }
|
|
|
713
|
|
|
714 width = p[18] * 256 + p[19];
|
|
|
715 height = p[22] * 256 + p[23];
|
|
|
716
|
|
|
717 break;
|
|
|
718
|
|
|
719 default:
|
|
|
720
|
|
|
721 return NGX_DECLINED;
|
|
|
722 }
|
|
|
723
|
|
|
724 ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
725 "image size: %d x %d", width, height);
|
|
|
726
|
|
|
727 ctx->width = width;
|
|
|
728 ctx->height = height;
|
|
|
729
|
|
|
730 return NGX_OK;
|
|
|
731 }
|
|
|
732
|
|
|
733
|
|
|
734 static ngx_buf_t *
|
|
|
735 ngx_http_image_resize(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
736 {
|
|
624
|
737 int sx, sy, dx, dy, ox, oy, ax, ay, size,
|
|
648
|
738 colors, palette, transparent, sharpen,
|
|
618
|
739 red, green, blue, t;
|
|
484
|
740 u_char *out;
|
|
|
741 ngx_buf_t *b;
|
|
|
742 ngx_uint_t resize;
|
|
|
743 gdImagePtr src, dst;
|
|
|
744 ngx_pool_cleanup_t *cln;
|
|
|
745 ngx_http_image_filter_conf_t *conf;
|
|
|
746
|
|
|
747 src = ngx_http_image_source(r, ctx);
|
|
|
748
|
|
|
749 if (src == NULL) {
|
|
|
750 return NULL;
|
|
|
751 }
|
|
|
752
|
|
|
753 sx = gdImageSX(src);
|
|
|
754 sy = gdImageSY(src);
|
|
|
755
|
|
|
756 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
|
757
|
|
558
|
758 if (!ctx->force
|
|
618
|
759 && ctx->angle == 0
|
|
558
|
760 && (ngx_uint_t) sx <= ctx->max_width
|
|
510
|
761 && (ngx_uint_t) sy <= ctx->max_height)
|
|
|
762 {
|
|
484
|
763 gdImageDestroy(src);
|
|
|
764 return ngx_http_image_asis(r, ctx);
|
|
|
765 }
|
|
|
766
|
|
|
767 colors = gdImageColorsTotal(src);
|
|
528
|
768
|
|
|
769 if (colors && conf->transparency) {
|
|
|
770 transparent = gdImageGetTransparent(src);
|
|
|
771
|
|
|
772 if (transparent != -1) {
|
|
|
773 palette = colors;
|
|
|
774 red = gdImageRed(src, transparent);
|
|
|
775 green = gdImageGreen(src, transparent);
|
|
|
776 blue = gdImageBlue(src, transparent);
|
|
484
|
777
|
|
528
|
778 goto transparent;
|
|
|
779 }
|
|
|
780 }
|
|
526
|
781
|
|
528
|
782 palette = 0;
|
|
|
783 transparent = -1;
|
|
|
784 red = 0;
|
|
|
785 green = 0;
|
|
|
786 blue = 0;
|
|
|
787
|
|
|
788 transparent:
|
|
|
789
|
|
|
790 gdImageColorTransparent(src, -1);
|
|
526
|
791
|
|
484
|
792 dx = sx;
|
|
|
793 dy = sy;
|
|
|
794
|
|
|
795 if (conf->filter == NGX_HTTP_IMAGE_RESIZE) {
|
|
|
796
|
|
510
|
797 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
798 dy = dy * ctx->max_width / dx;
|
|
484
|
799 dy = dy ? dy : 1;
|
|
510
|
800 dx = ctx->max_width;
|
|
484
|
801 }
|
|
|
802
|
|
510
|
803 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
804 dx = dx * ctx->max_height / dy;
|
|
484
|
805 dx = dx ? dx : 1;
|
|
510
|
806 dy = ctx->max_height;
|
|
484
|
807 }
|
|
|
808
|
|
|
809 resize = 1;
|
|
|
810
|
|
618
|
811 } else if (conf->filter == NGX_HTTP_IMAGE_ROTATE) {
|
|
|
812
|
|
|
813 resize = 0;
|
|
|
814
|
|
484
|
815 } else { /* NGX_HTTP_IMAGE_CROP */
|
|
|
816
|
|
|
817 resize = 0;
|
|
|
818
|
|
510
|
819 if ((ngx_uint_t) (dx * 100 / dy)
|
|
|
820 < ctx->max_width * 100 / ctx->max_height)
|
|
|
821 {
|
|
|
822 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
823 dy = dy * ctx->max_width / dx;
|
|
484
|
824 dy = dy ? dy : 1;
|
|
510
|
825 dx = ctx->max_width;
|
|
484
|
826 resize = 1;
|
|
|
827 }
|
|
|
828
|
|
|
829 } else {
|
|
510
|
830 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
831 dx = dx * ctx->max_height / dy;
|
|
484
|
832 dx = dx ? dx : 1;
|
|
510
|
833 dy = ctx->max_height;
|
|
484
|
834 resize = 1;
|
|
|
835 }
|
|
|
836 }
|
|
|
837 }
|
|
|
838
|
|
|
839 if (resize) {
|
|
528
|
840 dst = ngx_http_image_new(r, dx, dy, palette);
|
|
484
|
841 if (dst == NULL) {
|
|
|
842 gdImageDestroy(src);
|
|
|
843 return NULL;
|
|
|
844 }
|
|
|
845
|
|
528
|
846 if (colors == 0) {
|
|
|
847 gdImageSaveAlpha(dst, 1);
|
|
|
848 gdImageAlphaBlending(dst, 0);
|
|
|
849 }
|
|
|
850
|
|
484
|
851 gdImageCopyResampled(dst, src, 0, 0, 0, 0, dx, dy, sx, sy);
|
|
|
852
|
|
528
|
853 if (colors) {
|
|
|
854 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
855 }
|
|
|
856
|
|
484
|
857 gdImageDestroy(src);
|
|
|
858
|
|
|
859 } else {
|
|
|
860 dst = src;
|
|
|
861 }
|
|
|
862
|
|
618
|
863 if (ctx->angle) {
|
|
|
864 src = dst;
|
|
|
865
|
|
624
|
866 ax = (dx % 2 == 0) ? 1 : 0;
|
|
|
867 ay = (dy % 2 == 0) ? 1 : 0;
|
|
|
868
|
|
618
|
869 switch (ctx->angle) {
|
|
|
870
|
|
|
871 case 90:
|
|
|
872 case 270:
|
|
|
873 dst = ngx_http_image_new(r, dy, dx, palette);
|
|
|
874 if (dst == NULL) {
|
|
|
875 gdImageDestroy(src);
|
|
|
876 return NULL;
|
|
|
877 }
|
|
624
|
878 if (ctx->angle == 90) {
|
|
|
879 ox = dy / 2 + ay;
|
|
|
880 oy = dx / 2 - ax;
|
|
|
881
|
|
|
882 } else {
|
|
|
883 ox = dy / 2 - ay;
|
|
|
884 oy = dx / 2 + ax;
|
|
|
885 }
|
|
|
886
|
|
|
887 gdImageCopyRotated(dst, src, ox, oy, 0, 0,
|
|
|
888 dx + ax, dy + ay, ctx->angle);
|
|
618
|
889 gdImageDestroy(src);
|
|
620
|
890
|
|
|
891 t = dx;
|
|
|
892 dx = dy;
|
|
|
893 dy = t;
|
|
618
|
894 break;
|
|
|
895
|
|
|
896 case 180:
|
|
|
897 dst = ngx_http_image_new(r, dx, dy, palette);
|
|
|
898 if (dst == NULL) {
|
|
|
899 gdImageDestroy(src);
|
|
|
900 return NULL;
|
|
|
901 }
|
|
624
|
902 gdImageCopyRotated(dst, src, dx / 2 - ax, dy / 2 - ay, 0, 0,
|
|
|
903 dx + ax, dy + ay, ctx->angle);
|
|
618
|
904 gdImageDestroy(src);
|
|
|
905 break;
|
|
|
906 }
|
|
|
907 }
|
|
|
908
|
|
484
|
909 if (conf->filter == NGX_HTTP_IMAGE_CROP) {
|
|
|
910
|
|
|
911 src = dst;
|
|
|
912
|
|
510
|
913 if ((ngx_uint_t) dx > ctx->max_width) {
|
|
|
914 ox = dx - ctx->max_width;
|
|
484
|
915
|
|
|
916 } else {
|
|
|
917 ox = 0;
|
|
|
918 }
|
|
|
919
|
|
510
|
920 if ((ngx_uint_t) dy > ctx->max_height) {
|
|
|
921 oy = dy - ctx->max_height;
|
|
484
|
922
|
|
|
923 } else {
|
|
|
924 oy = 0;
|
|
|
925 }
|
|
|
926
|
|
|
927 if (ox || oy) {
|
|
|
928
|
|
|
929 dst = ngx_http_image_new(r, dx - ox, dy - oy, colors);
|
|
|
930
|
|
|
931 if (dst == NULL) {
|
|
|
932 gdImageDestroy(src);
|
|
|
933 return NULL;
|
|
|
934 }
|
|
|
935
|
|
|
936 ox /= 2;
|
|
|
937 oy /= 2;
|
|
|
938
|
|
|
939 ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
940 "image crop: %d x %d @ %d x %d",
|
|
|
941 dx, dy, ox, oy);
|
|
|
942
|
|
528
|
943 if (colors == 0) {
|
|
|
944 gdImageSaveAlpha(dst, 1);
|
|
|
945 gdImageAlphaBlending(dst, 0);
|
|
|
946 }
|
|
|
947
|
|
484
|
948 gdImageCopy(dst, src, 0, 0, ox, oy, dx - ox, dy - oy);
|
|
|
949
|
|
528
|
950 if (colors) {
|
|
|
951 gdImageTrueColorToPalette(dst, 1, 256);
|
|
|
952 }
|
|
|
953
|
|
484
|
954 gdImageDestroy(src);
|
|
|
955 }
|
|
|
956 }
|
|
|
957
|
|
526
|
958 if (transparent != -1 && colors) {
|
|
|
959 gdImageColorTransparent(dst, gdImageColorExact(dst, red, green, blue));
|
|
|
960 }
|
|
484
|
961
|
|
648
|
962 sharpen = ngx_http_image_filter_get_value(r, conf->shcv, conf->sharpen);
|
|
|
963 if (sharpen > 0) {
|
|
|
964 gdImageSharpen(dst, sharpen);
|
|
|
965 }
|
|
|
966
|
|
484
|
967 out = ngx_http_image_out(r, ctx->type, dst, &size);
|
|
|
968
|
|
|
969 ngx_log_debug3(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
|
|
|
970 "image: %d x %d %d", sx, sy, colors);
|
|
|
971
|
|
|
972 gdImageDestroy(dst);
|
|
|
973 ngx_pfree(r->pool, ctx->image);
|
|
|
974
|
|
|
975 if (out == NULL) {
|
|
|
976 return NULL;
|
|
|
977 }
|
|
|
978
|
|
|
979 cln = ngx_pool_cleanup_add(r->pool, 0);
|
|
|
980 if (cln == NULL) {
|
|
|
981 gdFree(out);
|
|
|
982 return NULL;
|
|
|
983 }
|
|
|
984
|
|
|
985 b = ngx_pcalloc(r->pool, sizeof(ngx_buf_t));
|
|
|
986 if (b == NULL) {
|
|
|
987 gdFree(out);
|
|
|
988 return NULL;
|
|
|
989 }
|
|
|
990
|
|
|
991 cln->handler = ngx_http_image_cleanup;
|
|
|
992 cln->data = out;
|
|
|
993
|
|
|
994 b->pos = out;
|
|
|
995 b->last = out + size;
|
|
|
996 b->memory = 1;
|
|
|
997 b->last_buf = 1;
|
|
|
998
|
|
|
999 ngx_http_image_length(r, b);
|
|
|
1000
|
|
|
1001 return b;
|
|
|
1002 }
|
|
|
1003
|
|
|
1004
|
|
|
1005 static gdImagePtr
|
|
|
1006 ngx_http_image_source(ngx_http_request_t *r, ngx_http_image_filter_ctx_t *ctx)
|
|
|
1007 {
|
|
|
1008 char *failed;
|
|
|
1009 gdImagePtr img;
|
|
|
1010
|
|
|
1011 img = NULL;
|
|
|
1012
|
|
|
1013 switch (ctx->type) {
|
|
|
1014
|
|
|
1015 case NGX_HTTP_IMAGE_JPEG:
|
|
|
1016 img = gdImageCreateFromJpegPtr(ctx->length, ctx->image);
|
|
|
1017 failed = "gdImageCreateFromJpegPtr() failed";
|
|
|
1018 break;
|
|
|
1019
|
|
|
1020 case NGX_HTTP_IMAGE_GIF:
|
|
|
1021 img = gdImageCreateFromGifPtr(ctx->length, ctx->image);
|
|
|
1022 failed = "gdImageCreateFromGifPtr() failed";
|
|
|
1023 break;
|
|
|
1024
|
|
|
1025 case NGX_HTTP_IMAGE_PNG:
|
|
|
1026 img = gdImageCreateFromPngPtr(ctx->length, ctx->image);
|
|
|
1027 failed = "gdImageCreateFromPngPtr() failed";
|
|
|
1028 break;
|
|
|
1029
|
|
|
1030 default:
|
|
|
1031 failed = "unknown image type";
|
|
|
1032 break;
|
|
|
1033 }
|
|
|
1034
|
|
|
1035 if (img == NULL) {
|
|
|
1036 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
1037 }
|
|
|
1038
|
|
|
1039 return img;
|
|
|
1040 }
|
|
|
1041
|
|
|
1042
|
|
|
1043 static gdImagePtr
|
|
|
1044 ngx_http_image_new(ngx_http_request_t *r, int w, int h, int colors)
|
|
|
1045 {
|
|
|
1046 gdImagePtr img;
|
|
|
1047
|
|
|
1048 if (colors == 0) {
|
|
|
1049 img = gdImageCreateTrueColor(w, h);
|
|
|
1050
|
|
|
1051 if (img == NULL) {
|
|
|
1052 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1053 "gdImageCreateTrueColor() failed");
|
|
|
1054 return NULL;
|
|
|
1055 }
|
|
|
1056
|
|
|
1057 } else {
|
|
|
1058 img = gdImageCreate(w, h);
|
|
|
1059
|
|
|
1060 if (img == NULL) {
|
|
|
1061 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
|
|
|
1062 "gdImageCreate() failed");
|
|
|
1063 return NULL;
|
|
|
1064 }
|
|
|
1065 }
|
|
|
1066
|
|
|
1067 return img;
|
|
|
1068 }
|
|
|
1069
|
|
|
1070
|
|
|
1071 static u_char *
|
|
|
1072 ngx_http_image_out(ngx_http_request_t *r, ngx_uint_t type, gdImagePtr img,
|
|
|
1073 int *size)
|
|
|
1074 {
|
|
492
|
1075 char *failed;
|
|
|
1076 u_char *out;
|
|
594
|
1077 ngx_int_t jq;
|
|
492
|
1078 ngx_http_image_filter_conf_t *conf;
|
|
484
|
1079
|
|
|
1080 out = NULL;
|
|
|
1081
|
|
|
1082 switch (type) {
|
|
|
1083
|
|
|
1084 case NGX_HTTP_IMAGE_JPEG:
|
|
492
|
1085 conf = ngx_http_get_module_loc_conf(r, ngx_http_image_filter_module);
|
|
594
|
1086
|
|
|
1087 jq = ngx_http_image_filter_get_value(r, conf->jqcv, conf->jpeg_quality);
|
|
|
1088 if (jq <= 0) {
|
|
|
1089 return NULL;
|
|
|
1090 }
|
|
|
1091
|
|
|
1092 out = gdImageJpegPtr(img, size, jq);
|
|
484
|
1093 failed = "gdImageJpegPtr() failed";
|
|
|
1094 break;
|
|
|
1095
|
|
|
1096 case NGX_HTTP_IMAGE_GIF:
|
|
|
1097 out = gdImageGifPtr(img, size);
|
|
|
1098 failed = "gdImageGifPtr() failed";
|
|
|
1099 break;
|
|
|
1100
|
|
|
1101 case NGX_HTTP_IMAGE_PNG:
|
|
|
1102 out = gdImagePngPtr(img, size);
|
|
|
1103 failed = "gdImagePngPtr() failed";
|
|
|
1104 break;
|
|
|
1105
|
|
|
1106 default:
|
|
|
1107 failed = "unknown image type";
|
|
|
1108 break;
|
|
|
1109 }
|
|
|
1110
|
|
|
1111 if (out == NULL) {
|
|
|
1112 ngx_log_error(NGX_LOG_ERR, r->connection->log, 0, failed);
|
|
|
1113 }
|
|
|
1114
|
|
|
1115 return out;
|
|
|
1116 }
|
|
|
1117
|
|
|
1118
|
|
|
1119 static void
|
|
|
1120 ngx_http_image_cleanup(void *data)
|
|
|
1121 {
|
|
|
1122 gdFree(data);
|
|
|
1123 }
|
|
|
1124
|
|
|
1125
|
|
510
|
1126 static ngx_uint_t
|
|
|
1127 ngx_http_image_filter_get_value(ngx_http_request_t *r,
|
|
|
1128 ngx_http_complex_value_t *cv, ngx_uint_t v)
|
|
|
1129 {
|
|
|
1130 ngx_str_t val;
|
|
|
1131
|
|
|
1132 if (cv == NULL) {
|
|
|
1133 return v;
|
|
|
1134 }
|
|
|
1135
|
|
|
1136 if (ngx_http_complex_value(r, cv, &val) != NGX_OK) {
|
|
|
1137 return 0;
|
|
|
1138 }
|
|
|
1139
|
|
|
1140 return ngx_http_image_filter_value(&val);
|
|
|
1141 }
|
|
|
1142
|
|
|
1143
|
|
|
1144 static ngx_uint_t
|
|
|
1145 ngx_http_image_filter_value(ngx_str_t *value)
|
|
|
1146 {
|
|
|
1147 ngx_int_t n;
|
|
|
1148
|
|
|
1149 if (value->len == 1 && value->data[0] == '-') {
|
|
|
1150 return (ngx_uint_t) -1;
|
|
|
1151 }
|
|
|
1152
|
|
|
1153 n = ngx_atoi(value->data, value->len);
|
|
|
1154
|
|
|
1155 if (n > 0) {
|
|
|
1156 return (ngx_uint_t) n;
|
|
|
1157 }
|
|
|
1158
|
|
|
1159 return 0;
|
|
|
1160 }
|
|
|
1161
|
|
|
1162
|
|
484
|
1163 static void *
|
|
|
1164 ngx_http_image_filter_create_conf(ngx_conf_t *cf)
|
|
|
1165 {
|
|
|
1166 ngx_http_image_filter_conf_t *conf;
|
|
|
1167
|
|
|
1168 conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_image_filter_conf_t));
|
|
|
1169 if (conf == NULL) {
|
|
496
|
1170 return NULL;
|
|
484
|
1171 }
|
|
|
1172
|
|
|
1173 conf->filter = NGX_CONF_UNSET_UINT;
|
|
594
|
1174 conf->jpeg_quality = NGX_CONF_UNSET_UINT;
|
|
648
|
1175 conf->sharpen = NGX_CONF_UNSET_UINT;
|
|
618
|
1176 conf->angle = NGX_CONF_UNSET_UINT;
|
|
528
|
1177 conf->transparency = NGX_CONF_UNSET;
|
|
484
|
1178 conf->buffer_size = NGX_CONF_UNSET_SIZE;
|
|
|
1179
|
|
|
1180 return conf;
|
|
|
1181 }
|
|
|
1182
|
|
|
1183
|
|
|
1184 static char *
|
|
|
1185 ngx_http_image_filter_merge_conf(ngx_conf_t *cf, void *parent, void *child)
|
|
|
1186 {
|
|
|
1187 ngx_http_image_filter_conf_t *prev = parent;
|
|
|
1188 ngx_http_image_filter_conf_t *conf = child;
|
|
|
1189
|
|
|
1190 if (conf->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1191
|
|
|
1192 if (prev->filter == NGX_CONF_UNSET_UINT) {
|
|
|
1193 conf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1194
|
|
|
1195 } else {
|
|
|
1196 conf->filter = prev->filter;
|
|
|
1197 conf->width = prev->width;
|
|
|
1198 conf->height = prev->height;
|
|
510
|
1199 conf->wcv = prev->wcv;
|
|
|
1200 conf->hcv = prev->hcv;
|
|
484
|
1201 }
|
|
|
1202 }
|
|
|
1203
|
|
492
|
1204 /* 75 is libjpeg default quality */
|
|
594
|
1205 ngx_conf_merge_uint_value(conf->jpeg_quality, prev->jpeg_quality, 75);
|
|
|
1206
|
|
|
1207 if (conf->jqcv == NULL) {
|
|
|
1208 conf->jqcv = prev->jqcv;
|
|
|
1209 }
|
|
492
|
1210
|
|
648
|
1211 ngx_conf_merge_uint_value(conf->sharpen, prev->sharpen, 0);
|
|
|
1212
|
|
|
1213 if (conf->shcv == NULL) {
|
|
|
1214 conf->shcv = prev->shcv;
|
|
|
1215 }
|
|
|
1216
|
|
618
|
1217 ngx_conf_merge_uint_value(conf->angle, prev->angle, 0);
|
|
|
1218 if (conf->acv == NULL) {
|
|
|
1219 conf->acv = prev->acv;
|
|
|
1220 }
|
|
|
1221
|
|
528
|
1222 ngx_conf_merge_value(conf->transparency, prev->transparency, 1);
|
|
|
1223
|
|
484
|
1224 ngx_conf_merge_size_value(conf->buffer_size, prev->buffer_size,
|
|
|
1225 1 * 1024 * 1024);
|
|
|
1226
|
|
|
1227 return NGX_CONF_OK;
|
|
|
1228 }
|
|
|
1229
|
|
|
1230
|
|
|
1231 static char *
|
|
|
1232 ngx_http_image_filter(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
|
|
|
1233 {
|
|
|
1234 ngx_http_image_filter_conf_t *imcf = conf;
|
|
|
1235
|
|
510
|
1236 ngx_str_t *value;
|
|
|
1237 ngx_int_t n;
|
|
|
1238 ngx_uint_t i;
|
|
|
1239 ngx_http_complex_value_t cv;
|
|
|
1240 ngx_http_compile_complex_value_t ccv;
|
|
484
|
1241
|
|
|
1242 value = cf->args->elts;
|
|
|
1243
|
|
|
1244 i = 1;
|
|
|
1245
|
|
|
1246 if (cf->args->nelts == 2) {
|
|
|
1247 if (ngx_strcmp(value[i].data, "off") == 0) {
|
|
|
1248 imcf->filter = NGX_HTTP_IMAGE_OFF;
|
|
|
1249
|
|
|
1250 } else if (ngx_strcmp(value[i].data, "test") == 0) {
|
|
|
1251 imcf->filter = NGX_HTTP_IMAGE_TEST;
|
|
|
1252
|
|
|
1253 } else if (ngx_strcmp(value[i].data, "size") == 0) {
|
|
|
1254 imcf->filter = NGX_HTTP_IMAGE_SIZE;
|
|
|
1255
|
|
|
1256 } else {
|
|
|
1257 goto failed;
|
|
|
1258 }
|
|
|
1259
|
|
|
1260 return NGX_CONF_OK;
|
|
618
|
1261
|
|
|
1262 } else if (cf->args->nelts == 3) {
|
|
|
1263
|
|
|
1264 if (ngx_strcmp(value[i].data, "rotate") == 0) {
|
|
|
1265 imcf->filter = NGX_HTTP_IMAGE_ROTATE;
|
|
|
1266
|
|
|
1267 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1268
|
|
|
1269 ccv.cf = cf;
|
|
|
1270 ccv.value = &value[++i];
|
|
|
1271 ccv.complex_value = &cv;
|
|
|
1272
|
|
|
1273 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1274 return NGX_CONF_ERROR;
|
|
|
1275 }
|
|
|
1276
|
|
|
1277 if (cv.lengths == NULL) {
|
|
|
1278 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1279
|
|
|
1280 if (n != 90 && n != 180 && n != 270) {
|
|
|
1281 goto failed;
|
|
|
1282 }
|
|
|
1283
|
|
|
1284 imcf->angle = (ngx_uint_t) n;
|
|
|
1285
|
|
|
1286 } else {
|
|
|
1287 imcf->acv = ngx_palloc(cf->pool,
|
|
|
1288 sizeof(ngx_http_complex_value_t));
|
|
|
1289 if (imcf->acv == NULL) {
|
|
|
1290 return NGX_CONF_ERROR;
|
|
|
1291 }
|
|
|
1292
|
|
|
1293 *imcf->acv = cv;
|
|
|
1294 }
|
|
|
1295
|
|
|
1296 return NGX_CONF_OK;
|
|
|
1297
|
|
|
1298 } else {
|
|
|
1299 goto failed;
|
|
|
1300 }
|
|
484
|
1301 }
|
|
|
1302
|
|
|
1303 if (ngx_strcmp(value[i].data, "resize") == 0) {
|
|
|
1304 imcf->filter = NGX_HTTP_IMAGE_RESIZE;
|
|
|
1305
|
|
|
1306 } else if (ngx_strcmp(value[i].data, "crop") == 0) {
|
|
|
1307 imcf->filter = NGX_HTTP_IMAGE_CROP;
|
|
|
1308
|
|
|
1309 } else {
|
|
|
1310 goto failed;
|
|
|
1311 }
|
|
|
1312
|
|
510
|
1313 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1314
|
|
|
1315 ccv.cf = cf;
|
|
|
1316 ccv.value = &value[++i];
|
|
|
1317 ccv.complex_value = &cv;
|
|
484
|
1318
|
|
510
|
1319 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1320 return NGX_CONF_ERROR;
|
|
|
1321 }
|
|
484
|
1322
|
|
510
|
1323 if (cv.lengths == NULL) {
|
|
|
1324 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1325
|
|
|
1326 if (n == 0) {
|
|
484
|
1327 goto failed;
|
|
|
1328 }
|
|
|
1329
|
|
|
1330 imcf->width = (ngx_uint_t) n;
|
|
510
|
1331
|
|
|
1332 } else {
|
|
|
1333 imcf->wcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1334 if (imcf->wcv == NULL) {
|
|
|
1335 return NGX_CONF_ERROR;
|
|
|
1336 }
|
|
|
1337
|
|
|
1338 *imcf->wcv = cv;
|
|
484
|
1339 }
|
|
|
1340
|
|
510
|
1341 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1342
|
|
|
1343 ccv.cf = cf;
|
|
|
1344 ccv.value = &value[++i];
|
|
|
1345 ccv.complex_value = &cv;
|
|
484
|
1346
|
|
510
|
1347 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1348 return NGX_CONF_ERROR;
|
|
|
1349 }
|
|
484
|
1350
|
|
510
|
1351 if (cv.lengths == NULL) {
|
|
|
1352 n = ngx_http_image_filter_value(&value[i]);
|
|
|
1353
|
|
|
1354 if (n == 0) {
|
|
484
|
1355 goto failed;
|
|
|
1356 }
|
|
|
1357
|
|
|
1358 imcf->height = (ngx_uint_t) n;
|
|
510
|
1359
|
|
|
1360 } else {
|
|
|
1361 imcf->hcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1362 if (imcf->hcv == NULL) {
|
|
|
1363 return NGX_CONF_ERROR;
|
|
|
1364 }
|
|
|
1365
|
|
|
1366 *imcf->hcv = cv;
|
|
484
|
1367 }
|
|
|
1368
|
|
|
1369 return NGX_CONF_OK;
|
|
|
1370
|
|
|
1371 failed:
|
|
|
1372
|
|
|
1373 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid parameter \"%V\"",
|
|
|
1374 &value[i]);
|
|
|
1375
|
|
|
1376 return NGX_CONF_ERROR;
|
|
|
1377 }
|
|
|
1378
|
|
|
1379
|
|
594
|
1380 static char *
|
|
|
1381 ngx_http_image_filter_jpeg_quality(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
1382 void *conf)
|
|
|
1383 {
|
|
|
1384 ngx_http_image_filter_conf_t *imcf = conf;
|
|
|
1385
|
|
|
1386 ngx_str_t *value;
|
|
|
1387 ngx_int_t n;
|
|
|
1388 ngx_http_complex_value_t cv;
|
|
|
1389 ngx_http_compile_complex_value_t ccv;
|
|
|
1390
|
|
|
1391 value = cf->args->elts;
|
|
|
1392
|
|
|
1393 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1394
|
|
|
1395 ccv.cf = cf;
|
|
|
1396 ccv.value = &value[1];
|
|
|
1397 ccv.complex_value = &cv;
|
|
|
1398
|
|
|
1399 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1400 return NGX_CONF_ERROR;
|
|
|
1401 }
|
|
|
1402
|
|
|
1403 if (cv.lengths == NULL) {
|
|
|
1404 n = ngx_http_image_filter_value(&value[1]);
|
|
|
1405
|
|
|
1406 if (n <= 0) {
|
|
|
1407 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
1408 "invalid parameter \"%V\"", &value[1]);
|
|
|
1409 return NGX_CONF_ERROR;
|
|
|
1410 }
|
|
|
1411
|
|
|
1412 imcf->jpeg_quality = (ngx_uint_t) n;
|
|
|
1413
|
|
|
1414 } else {
|
|
|
1415 imcf->jqcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1416 if (imcf->jqcv == NULL) {
|
|
|
1417 return NGX_CONF_ERROR;
|
|
|
1418 }
|
|
|
1419
|
|
|
1420 *imcf->jqcv = cv;
|
|
|
1421 }
|
|
|
1422
|
|
|
1423 return NGX_CONF_OK;
|
|
|
1424 }
|
|
|
1425
|
|
|
1426
|
|
648
|
1427 static char *
|
|
|
1428 ngx_http_image_filter_sharpen(ngx_conf_t *cf, ngx_command_t *cmd,
|
|
|
1429 void *conf)
|
|
|
1430 {
|
|
|
1431 ngx_http_image_filter_conf_t *imcf = conf;
|
|
|
1432
|
|
|
1433 ngx_str_t *value;
|
|
|
1434 ngx_int_t n;
|
|
|
1435 ngx_http_complex_value_t cv;
|
|
|
1436 ngx_http_compile_complex_value_t ccv;
|
|
|
1437
|
|
|
1438 value = cf->args->elts;
|
|
|
1439
|
|
|
1440 ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
|
|
|
1441
|
|
|
1442 ccv.cf = cf;
|
|
|
1443 ccv.value = &value[1];
|
|
|
1444 ccv.complex_value = &cv;
|
|
|
1445
|
|
|
1446 if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
|
|
|
1447 return NGX_CONF_ERROR;
|
|
|
1448 }
|
|
|
1449
|
|
|
1450 if (cv.lengths == NULL) {
|
|
|
1451 n = ngx_http_image_filter_value(&value[1]);
|
|
|
1452
|
|
|
1453 if (n < 0) {
|
|
|
1454 ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
|
|
|
1455 "invalid parameter \"%V\"", &value[1]);
|
|
|
1456 return NGX_CONF_ERROR;
|
|
|
1457 }
|
|
|
1458
|
|
|
1459 imcf->sharpen = (ngx_uint_t) n;
|
|
|
1460
|
|
|
1461 } else {
|
|
|
1462 imcf->shcv = ngx_palloc(cf->pool, sizeof(ngx_http_complex_value_t));
|
|
|
1463 if (imcf->shcv == NULL) {
|
|
|
1464 return NGX_CONF_ERROR;
|
|
|
1465 }
|
|
|
1466
|
|
|
1467 *imcf->shcv = cv;
|
|
|
1468 }
|
|
|
1469
|
|
|
1470 return NGX_CONF_OK;
|
|
|
1471 }
|
|
|
1472
|
|
|
1473
|
|
484
|
1474 static ngx_int_t
|
|
|
1475 ngx_http_image_filter_init(ngx_conf_t *cf)
|
|
|
1476 {
|
|
|
1477 ngx_http_next_header_filter = ngx_http_top_header_filter;
|
|
|
1478 ngx_http_top_header_filter = ngx_http_image_header_filter;
|
|
|
1479
|
|
|
1480 ngx_http_next_body_filter = ngx_http_top_body_filter;
|
|
|
1481 ngx_http_top_body_filter = ngx_http_image_body_filter;
|
|
|
1482
|
|
|
1483 return NGX_OK;
|
|
|
1484 }
|
