阿里云:
1.获取基本信息 @info
http://image-demo.img.aliyuncs.com/example.jpg@info

{
    "height": 267,
    "size": 21839,
    "width": 400
}

2.获取exif信息 @exif
http://image-demo.img.aliyuncs.com/f.jpg@exif

没有 exif 信息的图片示例
< Error>
< Code>BadRequest< /Code>
< Message>Image has no exif info.< /Message>
< RequestId>5502D98553F47BFAB7F95B8C< /RequestId>
< HostId>image-demo.img.aliyuncs.com< /HostId>
< /Error>
包含 exif 信息的图片示例
{
    "Compression": {"value": "6"},
    "DateTime": {"value": "2015:02:11 15:38:27"},
    "ExifTag": {"value": "2212"},
    "FileSize": {"value": "23471"},
    "GPSLatitude": {"value": "0deg "},
    "GPSLatitudeRef": {"value": "North"},
    "GPSLongitude": {"value": "0deg "},
    "GPSLongitudeRef": {"value": "East"},
    "GPSMapDatum": {"value": "WGS-84"},
    "GPSTag": {"value": "4292"},
    "GPSVersionID": {"value": "2 2 0 0"},
    "ImageHeight": {"value": "333"},
    "ImageWidth": {"value": "424"},
    "JPEGInterchangeFormat": {"value": "4518"},
    "JPEGInterchangeFormatLength": {"value": "3232"},
    "Orientation": {"value": "7"},
    "ResolutionUnit": {"value": "2"},
    "Software": {"value": "Microsoft Windows Photo Viewer 6.1.7600.16385"},
    "XResolution": {"value": "96/1"},
    "YResolution": {"value": "96/1"}
}

七牛云: 

(直接在图片后面添加 ?exif)
http://dn-odum9helk.qbox.me/resource/gogopher.jpg?exif

{
	"ApertureValue": {
		"val": "5.00 EV (f/5.7)",
		"type": 5
	},
	"ColorSpace": {
		"val": "sRGB",
		"type": 3
	},
	"ComponentsConfiguration": {
		"val": "- - - -",
		"type": 7
	},
	"CustomRendered": {
		"val": "Normal process",
		"type": 3
	},
	"DateTime": {
		"val": "2011:11:19 17:09:23",
		"type": 2
	},
	"DateTimeDigitized": {
		"val": "2011:11:19 17:09:23",
		"type": 2
	},
	"DateTimeOriginal": {
		"val": "2011:11:19 17:09:23",
		"type": 2
	},
	"ExifVersion": {
		"val": "Unknown Exif Version",
		"type": 7
	},
	"ExposureBiasValue": {
		"val": "0.33 EV",
		"type": 10
	},
	"ExposureMode": {
		"val": "Auto exposure",
		"type": 3
	},
	"ExposureProgram": {
		"val": "Aperture priority",
		"type": 3
	},
	"ExposureTime": {
		"val": "1/50 sec.",
		"type": 5
	},
	"FNumber": {
		"val": "f/5.6",
		"type": 5
	},
	"Flash": {
		"val": "Flash did not fire, compulsory flash mode",
		"type": 3
	},
	"FlashPixVersion": {
		"val": "FlashPix Version 1.0",
		"type": 7
	},
	"FocalLength": {
		"val": "45.0 mm",
		"type": 5
	},
	"FocalPlaneResolutionUnit": {
		"val": "Inch",
		"type": 3
	},
	"FocalPlaneXResolution": {
		"val": "5728.18",
		"type": 5
	},
	"FocalPlaneYResolution": {
		"val": "5808.40",
		"type": 5
	},
	"ISOSpeedRatings": {
		"val": "3200",
		"type": 3
	},
	"Make": {
		"val": "Canon",
		"type": 2
	},
	"MaxApertureValue": {
		"val": "5.19 EV (f/6.0)",
		"type": 5
	},
	"MeteringMode": {
		"val": "Pattern",
		"type": 3
	},
	"Model": {
		"val": "Canon EOS 600D",
		"type": 2
	},
	"Orientation": {
		"val": "Top-left",
		"type": 3
	},
	"PixelXDimension": {
		"val": "640",
		"type": 4
	},
	"PixelYDimension": {
		"val": "427",
		"type": 4
	},
	"ResolutionUnit": {
		"val": "Inch",
		"type": 3
	},
	"SceneCaptureType": {
		"val": "Standard",
		"type": 3
	},
	"ShutterSpeedValue": {
		"val": "5.62 EV (1/49 sec.)",
		"type": 10
	},
	"SubSecTimeDigitized": {
		"val": "11",
		"type": 2
	},
	"SubSecTimeOriginal": {
		"val": "11",
		"type": 2
	},
	"SubsecTime": {
		"val": "11",
		"type": 2
	},
	"WhiteBalance": {
		"val": "Auto white balance",
		"type": 3
	},
	"XResolution": {
		"val": "72",
		"type": 5
	},
	"YResolution": {
		"val": "72",
		"type": 5
	}
}