[web.py]上传图片并生成略缩图
生成略缩图时，用到了第三方库 PIL(Python Imaging Library) 。
upload.py
import web
import Image
urls = ('/upload', 'Upload')
render = web.template.render('templates/',)
class Upload:
def GET(self):
web.header("Content-Type","text/html; charset=utf-8")
return render.upload('')
def POST(self):
x = web.input(myfile={})
filedir = './static' # change this to the directory you want to store the file in.
if 'myfile' in x: # to check if the file-object is created
filepath=x.myfile.filename.replace('\\','/') # replaces the windows-style slashes with linux ones.
filename=filepath.split('/')[-1] # splits the and chooses the last part (the filename with extension)
fout = open(filedir +'/'+ filename,'wb') # creates the file where the uploaded file should be stored
fout.write(x.myfile.file.read()) # writes the uploaded file to the newly created file.
fout.close() # closes the file, upload complete.
infile = filedir +'/'+filename
outfile = infile + ".thumbnail"
im = Image.open(filedir +'/'+filename)
im.thumbnail((128, 128))
im.save(outfile, im.format)
return render.upload(outfile)
if __name__ == "__main__":
app = web.application(urls, globals())
app.run()
upload.html
$def with(src)
<html><head></head><body>
<form method="POST" enctype="multipart/form-data" action="">
<input type="file" name="myfile" />
<br/>
<input type="submit" />
</form>
$if src:
<img src="$src" />
</body></html>
参考
- Web.py Cookbook(File Upload)
- Web.py Cookbook(Store an uploaded file)
- pil-handbook(Reading and Writing Images)
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