. 1 Import OS 2 from Flask Import the Flask, the render_template, the redirect, jsonify, the send_file . 3 App = the Flask ( the __name__ ) . 4 . 5 # development debug mode is turned on, the parameters may be provided directly app.run () in . 6 # app.debug = true . 7 # the app.config [ 'the DEBUG'] = true . 8 . 9 10 # (. 1) Flask similar return in the return HttpResponse django () . 11 # return directly back to the text, the string may return after 1.1.1 , dictionaries, and other tuples, 12 is # of The return type MUST BE A String, dict, tuple, the Response instance, or the WSGI Callable 13 is @ app.route ( ' / ' ) 14 DEF Home (): 15 return ' first_flask ' 16 . 17 # @ app.route (' / ') 18 is # DEF Home (): . 19 # return {' Key ':' first_flask '} 20 is 21 is # (2) return render_template flask in () return render () is similar to django 22 # return render_teplate () returns a static file page 23 @ app.route ( ' / index ' ) 24- DEF index (): 25 return render_template ( ' index.html ' ) 26 27 28 # return the redirect (. 3) in Flask () similar to the return redirect django () 302 temporary redirection 29 # return the redirect () redirection request 30 @ app.route ( ' / Reback ' ) 31 is DEF Reback () : 32 return the redirect ( ' / index ' ) 33 is 34 is 35 36 # (. 4) in Flask jsonify () supports direct data transmission type json 37 [ @ app.route ( ' / flask_json ' ) 38 is DEF flask_json (): 39 return jsonify ([ ' A ' , 2 ]) 40 41 is 42 is # (. 5) in the return send_file Flask () can return directly to the file 43 # rear send_file will automatically identify the returned documents, or unidentified class browser will not resolve Download 44 is @ app.route ( ' / flask_file ' ) 45 DEF flask_file (): 46 is filepath = the os.path.join (os.path.dirname (os.path.abspath with ( __FILE__ )), ' File ' ) 47 filename = ' 1.png ' # the Type-the Content: Image / PNG 48 # filename = '1.mp3' # the Content-the Type: Audio / MPEG 49 # filename = '1.mp4' the Type-the Content #: Video / MP4 50 # filename = '1.pdf' #Content-Type: application/pdf 51 # filename = '1.pptx' #Content-Type: application/vnd.openxmlformats-officedocument.presentationml.presentation 52 # filename = '1.docx' #Content-Type: application/vnd.openxmlformats-officedocument.wordprocessingml.document 53 # filename='1.zip' #Content-Type: application/x-zip-compressed 54 # filename='1.rar' #Content-Type: application/octet-stream 55 file=os.path.join(filepath,filename) 56 return send_file(file) 57 58 59 if __name__ == ' __Main__ ' : 60 #flak service default port 5000, can be specified by the parameter 61 is # app.run () 62 is app.run (= Host ' 192.168.16.14 ' , Port = 8888, Debug = True)
