变量

{"value":"\u53d8\u91cf\u662f\u79c1\u6709\u4e91\u5b58\u50a8\u540c\u7528\u6237\u4ea4\u6362\u6570\u636e\u7684\u673a\u5236\uff0c\u5f15\u5165\u53d8\u91cf\u7684\u76ee\u7684\u5728\u4e8e\u66f4\u7075\u6d3b\u7684\u63a7\u5236\u4e0a\u4f20\u540e\u7eed\u52a8\u4f5c\u4e2d\u7684\u5185\u5bb9\u7ec4\u7ec7\u548c\u4f20\u9012\u3002\u53ef\u4ee5\u8ba4\u4e3a\u53d8\u91cf\u662f\u4e00\u79cd\u5360\u4f4d\u7b26\uff0c\u79c1\u6709\u4e91\u5b58\u50a8\u4f1a\u5c06\u5360\u4f4d\u7b26\u6309\u7ea6\u5b9a\u66ff\u6362\u4e3a\u5b9e\u9645\u5185\u5bb9\u3002\n\n\u5728\u6784\u9020\u4e0a\u4f20\u7b56\u7565 (PutPolicy)\u65f6\uff0c\u53ef\u5728\u4e0a\u4f20\u7b56\u7565\u7684`ReturnBody`\u548c`callbackBody`\u5b57\u6bb5\u5185\u5bb9\u4e2d\u4f7f\u7528\u53d8\u91cf\u3002\n\n\u53d8\u91cf\u5206\u4e3a\u4e24\u79cd\uff1a\u9b54\u6cd5\u53d8\u91cf\u548c \u81ea\u5b9a\u4e49\u53d8\u91cf\u3002\u9b54\u6cd5\u53d8\u91cf\u662f\u7cfb\u7edf\u63d0\u4f9b\u7684\u4e00\u7cfb\u5217\u9884\u5b9a\u4e49\u53d8\u91cf\uff0c\u53ef\u76f4\u63a5\u4f7f\u7528\u3002\u800c\u81ea\u5b9a\u4e49\u53d8\u91cf\u5219\u7531\u8c03\u7528\u65b9\u6307\u5b9a\uff0c\u901a\u5e38\u5e94\u5bf9\u4e8e\u4e0a\u4f20\u65f6\u7684\u8868\u5355\u53c2\u6570\uff0c\u670d\u52a1\u7aef\u4f1a\u5c06\u8fd9\u4e9b\u4e0a\u4f20\u53c2\u6570\u7684\u5177\u4f53\u503c\u8fd4\u56de\u7ed9\u8c03\u7528\u65b9\u3002\n\n\n\n# \u9b54\u6cd5\u53d8\u91cf\n\n\u9b54\u6cd5\u53d8\u91cf\u662f\u4e00\u7ec4\u9884\u5148\u5b9a\u4e49\u7684\u53d8\u91cf\uff0c\u53ef\u4ee5\u4f7f\u7528 `$(var)`\u6216`${var}`\uff0c\u4ee5\u53ca`$(var.field_name)`\u6216`${var.field_name}` \u5f62\u5f0f\u6c42\u503c\u3002\u5728\u793a\u4f8b\u4e2d\u6211\u4eec\u4f7f\u7528\u7684\u662f`$(var)`\u6216`$(var.field_name)`\u7684\u5f62\u5f0f\uff0c\u60a8\u4e5f\u53ef\u4ee5\u66ff\u6362\u6210`${var}`\u6216`${var.field_name}`\u3002\n\n\u76ee\u524d\u53ef\u7528\u7684\u9b54\u6cd5\u53d8\u91cf\u5982\u4e0b:\n\n| \u53d8\u91cf\u540d | \u5305\u542b\u5b50\u9879 | \u53d8\u91cf\u8bf4\u660e | \u9002\u7528\u8303\u56f4 |\n| :----------- | :------- | ------------------------------------------------------------ | ------------------------------------------------------- |\n| bucket | | \u83b7\u5f97\u4e0a\u4f20\u7684\u76ee\u6807\u7a7a\u95f4\u540d\u3002 | |\n| key | | \u83b7\u5f97\u6587\u4ef6\u4fdd\u5b58\u5728\u7a7a\u95f4\u4e2d\u7684\u8d44\u6e90\u540d\u3002 | |\n| etag | | \u6587\u4ef6\u4e0a\u4f20\u6210\u529f\u540e\u7684 HTTPETag\u3002\u82e5\u4e0a\u4f20\u65f6\u672a\u6307\u5b9a\u8d44\u6e90ID\uff0cEtag\u5c06\u4f5c\u4e3a\u8d44\u6e90ID\u4f7f\u7528\u3002 | |\n| fname | | \u4e0a\u4f20\u7684\u539f\u59cb\u6587\u4ef6\u540d\u3002 | |\n| fsize | | \u8d44\u6e90\u5c3a\u5bf8\uff0c\u5355\u4f4d\u4e3a\u5b57\u8282\u3002 | |\n| mimeType | | \u8d44\u6e90\u7c7b\u578b\uff0c\u4f8b\u5982JPG\u56fe\u7247\u7684\u8d44\u6e90\u7c7b\u578b\u4e3a`image\/jpg`\u3002 | |\n| endUser | | \u4e0a\u4f20\u65f6\u6307\u5b9a\u7684`endUser`\u5b57\u6bb5\uff0c\u901a\u5e38\u7528\u4e8e\u533a\u5206\u4e0d\u540c\u7ec8\u7aef\u7528\u6237\u7684\u8bf7\u6c42\u3002 | |\n| persistentId | | \u97f3\u89c6\u9891\u8f6c\u7801\u6301\u4e45\u5316\u7684\u8fdb\u5ea6\u67e5\u8be2ID\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e persistentOps \u4e2d |\n| exif | \u662f | \u83b7\u53d6\u4e0a\u4f20\u56fe\u7247\u7684Exif\u4fe1\u606f\u3002\u8be5\u53d8\u91cf\u5305\u542b\u5b50\u5b57\u6bb5\uff0c\u4f8b\u5982\u5bf9`$(exif.ApertureValue.val)`\u53d6\u503c\u5c06\u5f97\u5230\u8be5\u56fe\u7247\u62cd\u6444\u65f6\u7684\u5149\u5708\u503c\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e saveKey\uff0cpersistentOps \u4e2d |\n| imageInfo | \u662f | \u83b7\u53d6\u6240\u4e0a\u4f20\u56fe\u7247\u7684\u57fa\u672c\u4fe1\u606f\u3002\u8be5\u53d8\u91cf\u5305\u542b\u5b50\u5b57\u6bb5\uff0c\u4f8b\u5982\u5bf9`$(imageInfo.width)`\u53d6\u503c\u5c06\u5f97\u5230\u8be5\u56fe\u7247\u7684\u5bbd\u5ea6\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e saveKey\uff0cpersistentOps \u4e2d |\n| year | | \u4e0a\u4f20\u65f6\u7684\u5e74\u4efd\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e returnBody\uff0cpersistentOps \u548c callbackBody \u4e2d |\n| mon | | \u4e0a\u4f20\u65f6\u7684\u6708\u4efd\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e returnBody\uff0cpersistentOps \u548c callbackBody \u4e2d |\n| day | | \u4e0a\u4f20\u65f6\u7684\u65e5\u671f\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e returnBody\uff0cpersistentOps \u548c callbackBody \u4e2d |\n| hour | | \u4e0a\u4f20\u65f6\u7684\u5c0f\u65f6\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e returnBody\uff0cpersistentOps \u548c callbackBody \u4e2d |\n| min | | \u4e0a\u4f20\u65f6\u7684\u5206\u949f\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e returnBody\uff0cpersistentOps \u548c callbackBody \u4e2d |\n| sec | | \u4e0a\u4f20\u65f6\u7684\u79d2\u949f\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e returnBody\uff0cpersistentOps \u548c callbackBody \u4e2d |\n| avinfo | \u662f | \u97f3\u89c6\u9891\u8d44\u6e90\u7684\u5143\u4fe1\u606f\u3002 | \u6682\u4e0d\u652f\u6301\u7528\u4e8e saveKey\uff0cpersistentOps \u4e2d |\n| imageAve | | \u56fe\u7247\u4e3b\u8272\u8c03\uff0c\u7b97\u6cd5\u7531Camera360\u53cb\u60c5\u63d0\u4f9b\u3002 | \u4e0d\u652f\u6301\u7528\u4e8e persistentOps \u4e2d |\n| ext | | \u4e0a\u4f20\u8d44\u6e90\u7684\u540e\u7f00\u540d\uff0c\u901a\u8fc7 $(fname) \u7684\u540e\u7f00\u6216\u8005\u81ea\u52a8\u68c0\u6d4b\u7684 mimeType \u6765\u83b7\u53d6\u3002\u4f18\u5148\u4f7f\u7528 $(fname) \u7684\u540e\u7f00 | |\n| fprefix | | $(fname) \u5ffd\u7565 $(ext) \u7684\u6587\u4ef6\u540d\u3002 | |\n| uuid | | \u751f\u6210`uuid` | \u4e0d\u652f\u6301\u7528\u4e8e saveKey\uff0cpersistentOps \u4e2d |\n| bodySha1 | | callbackBody\u7684sha1\uff08hex\u7f16\u7801\uff09 | \u53ea\u652f\u6301\u7528\u4e8e callbackUrl \u4e2d |\n\n\u9b54\u6cd5\u53d8\u91cf\u652f\u6301`$(<Object>.<Property>)`\u5f62\u5f0f\u7684\u8bbf\u95ee\u5b50\u9879\uff0c\u4f8b\u5982\uff1a\n\n- $(\\)\n- $(\\.\\)\n- $(\\.\\.\\)\n\n\u6c42\u503c\u4e3e\u4f8b\uff1a\n\n- `$(bucket)` - \u83b7\u5f97\u4e0a\u4f20\u76ee\u6807bucket\u540d\u5b57\n- `$(imageInfo)` - \u83b7\u53d6\u5f53\u524d\u4e0a\u4f20\u56fe\u7247\u7684\u57fa\u672c\u5c5e\u6027\u4fe1\u606f\n- `$(imageInfo.height)` - \u83b7\u53d6\u5f53\u524d\u4e0a\u4f20\u56fe\u7247\u7684\u539f\u59cb\u9ad8\u5ea6\n\n\u9b54\u6cd5\u53d8\u91cf\u4e0d\u652f\u6301\u6570\u7ec4\u5f62\u5f0f\u7684\u8bbf\u95ee\u5b50\u9879\uff0c\u4f8b\u5982\uff1a\n\n- $(\\[0])\n- $(\\.\\[0])\n\n\u53d8\u91cf`avinfo`\u5728`returnBody`\u4e2d\u8fd4\u56de\u7684\u683c\u5f0f\u4e0d\u540c\u4e8eurl\u89e6\u53d1\u8fd4\u56de\u7684`avinfo`\u683c\u5f0f\uff0c`avinfo`\u5728\u9b54\u6cd5\u53d8\u91cf\u4e2d\u7684\u7c7b\u578b\u5982\u4e0b\uff08\u5185\u5bb9\u7ecf\u8fc7\u683c\u5f0f\u5316\u4ee5\u4fbf\u9605\u8bfb\uff09\uff1a\n\n```\n{\n \"audio\":{\n \"bit_rate\":\"64028\",\n \"channels\":1,\n \"codec_name\":\"mp3\",\n \"codec_type\":\"audio\",\n \"duration\":\"30.105556\",\n \"index\":1,\n \"nb_frames\":\"1153\",\n \"r_frame_rate\":\"0\/0\",\n \"sample_fmt\":\"s16p\",\n \"sample_rate\":\"44100\",\n \"start_time\":\"0.000000\",\n \"tags\":{\n \"creation_time\":\"2012-10-21 01:13:54\"\n }\n },\n \"format\":{\n \"bit_rate\":\"918325\",\n \"duration\":\"30.106000\",\n \"format_long_name\":\"QuickTime \/ MOV\",\n \"format_name\":\"mov,mp4,m4a,3gp,3g2,mj2\",\n \"nb_streams\":2,\n \"size\":\"3455888\",\n \"start_time\":\"0.000000\",\n \"tags\":{\n \"creation_time\":\"2012-10-21 01:13:54\"\n }\n },\n \"video\":{\n \"bit_rate\":\"856559\",\n \"codec_name\":\"h264\",\n \"codec_type\":\"video\",\n \"display_aspect_ratio\":\"4:3\",\n \"duration\":\"29.791667\",\n \"height\":480,\n \"index\":0,\n \"nb_frames\":\"715\",\n \"pix_fmt\":\"yuv420p\",\n \"r_frame_rate\":\"24\/1\",\n \"sample_aspect_ratio\":\"1:1\",\n \"start_time\":\"0.000000\",\n \"tags\":{\n \"creation_time\":\"2012-10-21 01:13:54\"\n },\n \"width\":640\n }\n}\n```\n\n\u53d8\u91cf`exif`\u7684\u7c7b\u578b\u5982\u4e0b\uff08\u5185\u5bb9\u7ecf\u8fc7\u683c\u5f0f\u5316\u4ee5\u4fbf\u9605\u8bfb\uff0c\u5177\u4f53\u7ec6\u8282\u8bf7\u53c2\u8003Exif\u6280\u672f\u767d\u76ae\u4e66\uff09\uff1a\n\n```\n{\n \"DateTime\" : {\n \"type\" : 2,\n \"val\" : \"2011:11:19 17:09:23\"\n },\n \"ExposureBiasValue\" : {\n \"type\" : 10,\n \"val\" : \"0.33 EV\"\n },\n \"ExposureTime\" : {\n \"type\" : 5,\n \"val\" : \"1\/50 sec.\"\n },\n \"Model\" : {\n \"type\" : 2,\n \"val\" : \"Canon EOS 600D\"\n },\n \"ISOSpeedRatings\" : {\n \"type\" : 3,\n \"val\" : \"3200\"\n },\n \"ResolutionUnit\" : {\n \"type\" : 3,\n \"val\" : \" \u82f1\u5bf8\"\n },\n\n ...\u540e\u7eed\u5185\u5bb9\u5df2\u7701\u7565...\n}\n```\n\n\u53d8\u91cf`imageInfo`\u5bf9\u5e94\u7684\u7c7b\u578b\u5982\u4e0b\uff08\u5185\u5bb9\u7ecf\u8fc7\u683c\u5f0f\u5316\u4ee5\u4fbf\u9605\u8bfb\uff09\uff1a\n\n```\n{\n \"format\": \"jpeg\",\n \"width\": 640,\n \"height\": 427,\n \"colorModel\": \"ycbcr\"\n}\n```\n\n\u5982\u679c\u53d8\u91cf\u53d6\u503c\u5931\u8d25\uff08\u4f8b\u5982\u5728\u4e0a\u4f20\u7b56\u7565 (PutPolicy)\u4e2d\u6307\u5b9a\u4e86\u4e00\u4e2a\u5e76\u4e0d\u5b58\u5728\u7684\u9b54\u6cd5\u53d8\u91cf\uff09\uff0c\u54cd\u5e94\u5185\u5bb9\u4e2d\u5bf9\u5e94\u7684\u53d8\u91cf\u5c06\u88ab\u8d4b\u4e88\u7a7a\u503c\u3002\n\n\n\n# \u81ea\u5b9a\u4e49\u53d8\u91cf\n\n\u5e94\u7528\u5ba2\u6237\u7aef\u5728\u4e0a\u4f20\u8bf7\u6c42\u4e2d\u8bbe\u5b9a\u81ea\u5b9a\u4e49\u53d8\u91cf\u7684\u503c\u3002\u79c1\u6709\u4e91\u5b58\u50a8\u6536\u5230\u8fd9\u4e9b\u53d8\u91cf\u4fe1\u606f\u540e\uff0c\u7f6e\u6362\u6389`ReturnBody`\u548c`callbackBody`\u4e2d\u7684\u81ea\u5b9a\u4e49\u53d8\u91cf\u8bbe\u7f6e\uff0c\u5f62\u6210\u6700\u7ec8\u7684\u53cd\u9988\u7ed3\u679c\u3002\n\n\u81ea\u5b9a\u4e49\u53d8\u91cf\u7684\u884c\u4e3a\u540c\u9b54\u6cd5\u53d8\u91cf\u57fa\u672c\u4e00\u81f4\uff0c\u4f46\u53d8\u91cf\u540d\u5fc5\u987b\u4ee5`x:`\u5f00\u59cb\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u81ea\u5b9a\u4e49\u53d8\u91cf\u7684\u793a\u4f8b\uff1a\n\n\u7528\u6237\u8bbe\u7f6e\u4e86\u5982\u4e0b\u7684`callbackBody`\uff1a\n\n```\nput_policy = '{\n ...\n \"callbackBody\" : \"name=$(fname)\n &hash=$(etag)\n &location=$(x:location)\n &price=$(x:price)\"\n ...\n}'\n```\n\n\u8fd9\u4e2a\u4f8b\u5b50\u4e2d\u7684`$(x:location)`\u548c`$(x:price)`\u5c31\u662f\u81ea\u5b9a\u4e49\u53d8\u91cf\u3002\n\n\u4e4b\u540e\uff0c\u7528\u6237\u7684\u5ba2\u6237\u7aef\u6784\u9020\u4e86\u5982\u4e0b\u8bf7\u6c42\uff1a\n\n```\n<form method=\"post\" action=\"http:\/\/upload.qiniup.com\/\"\nenctype=\"multipart\/form-data\">\n <input name=\"key\" type=\"hidden\" value=\"sunflower.jpg\">\n <input name=\"x:location\" type=\"hidden\" value=\"Shanghai\">\n <input name=\"x:price\" type=\"hidden\" value=\"1500.00\">\n <input name=\"token\" type=\"hidden\" value=\"...\">\n <input name=\"file\" type=\"file\" \/>\n<\/form>\n```\n\n\u6587\u4ef6\u4e0a\u4f20\u5b8c\u6210\u540e\uff0c\u670d\u52a1\u7aef\u4f1a\u5c06\u8bf7\u6c42\u4e2d\u7684`x:location`\u548c`x:price`\u7684\u503c\uff0c\u66ff\u6362`callbackBody`\u4e2d\u7684\u81ea\u5b9a\u4e49\u53d8\u91cf\uff1a\n\n```\nname=sunflower.jpg\n&hash=Fn6qeQi4VDLQ347NiRm- \\\nRlQx_4O2\n&location=Shanghai&price=1500.00\n```\n\n\u7136\u540e\uff0c\u79c1\u6709\u4e91\u5b58\u50a8\u5c06\u6b64\u7ed3\u679c\u8fdb\u884cURL \u5b89\u5168\u7684 Base64 \u7f16\u7801\uff0c\u4f5c\u4e3a\u56de\u8c03\u8bf7\u6c42\u7684Body\u8c03\u7528`callbackUrl`\u6307\u5b9a\u7684\u56de\u8c03\u670d\u52a1\u5668\u3002\n\n\u5982\u679c\u53d8\u91cf\u53d6\u503c\u5931\u8d25\uff08\u4f8b\u5982\u5728\u4e0a\u4f20\u7b56\u7565 (PutPolicy)\u4e2d\u6307\u5b9a\u4e86\u4e00\u4e2a\u5e76\u4e0d\u5b58\u5728\u7684\u8868\u5355\u53d8\u91cf\uff09\uff0c\u54cd\u5e94\u5185\u5bb9\u4e2d\u5bf9\u5e94\u7684\u53d8\u91cf\u5c06\u88ab\u8d4b\u4e88\u7a7a\u503c\u3002"}