Simple image upload and download

I. Uploading of images

1. The source of the image is nothing more than the selection of photos and galleries, and then upload the way to upload

2. The way to upload is also two ways to pass the string or stream the way (first establish the link in the pass stream)

3. The data returned by the server is the identity of the upload success or not

Two. Download the image

1. Level three cache ()

2. Third-party frameworks

More information: http://blog.sina.com.cn/s/blog_9ac333de0101gptn.html
http://blog.csdn.net/u011240877/article/details/45824855

Simple image upload and download