[Oldboy-django] [2 in-depth Django] Login Registration page Verification Code

Generate random verification code in the background

#Verification Code Generation-in the login.html, there is a verification code picture set the src URL of the picture, the equivalent of sending a GET request, the content returned is the content of the picture rendered<divclass="col-sm-5"> <input type="Password" class="Form-control"Id="InputPassword3"Placeholder="Verification Code"> </div> <divclass="col-sm-5"> "/check_code/"Width="150px"height="34px"title="Click Refresh Verification Code"> </div>-randomly generate picture contentdefCheck_code (Request): fromPILImportImage,imagedraw fromIoImportBytesio F= Bytesio ()#open up a space from memoryimg = image.new (mode="RGB", Size= (150,34), color= (255, 255, 255)) Draw= Imagedraw.draw (IMG, mode='RGB')            #set font for picture text             fromPILImportImagefont Font= Imagefont.truetype ("Kumo.ttf", 25)            #7 Adding content to a picture set a different color for each character            ImportRandom code_list= []             forIinchRange (5): Char= Chr (Random.randint (65,90) ) code_list.append (char) draw.text ((I*20,10), char, fill= (Random.randint (0,255), Random.randint (0,255), Random.randint (0,255)), Font=font)#Add content EndImg.save (F,'PNG')#Save picture contents to memorydata = F.getvalue ()#Read picture content            returnHttpResponse (data)

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The verification code is saved in session, the user submits the verification code and the session verification code to compare, completes the Verification Code verification

-Save the verification code in session to remember the user. So that the code is validated by the following verification code="". Join (code_list) request.session["Code"] =Code-Login Verification Code VerificationdefLogin (Request):ifRequest.method = ='GET':                returnRender (Request,'login.html')            Else: Input_code= Request. Post.get ("Code") Session_code= Request.session.get ('Code')                ifInput_code.upper () = =session_code.upper ():returnHttpResponse ("code is correct")                Else:                    returnHttpResponse ("Code is invalid")

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Encapsulating the Verification code

-Verification Code EncapsulationImportRandom fromPILImport(Image,imagedraw,imagefont,imagefilter)defCheck_code (width=120, height=30, char_length=5, font_file='Kumo.ttf', font_size=28): Code=[] img= Image.new (mode='RGB', size= (width, height), color= (255, 255, 255)) Draw= Imagedraw.draw (IMG, mode='RGB')        defRndchar ():"""generate random letters: return:"""            returnChr (Random.randint (65, 90))        defRndcolor ():"""generate random color: return:"""            return(Random.randint (0, 255), Random.randint (ten, 255), Random.randint (64, 255))        #Write TextFont =Imagefont.truetype (Font_file, font_size) forIinchRange (char_length): Char=Rndchar () code.append (char) H= Random.randint (0, 4) Draw.text ([I* Width/char_length, H], char, Font=font, fill=Rndcolor ())#Write interference points         forIinchRange (40): Draw.point ([Random.randint (0, width), random.randint (0, height)], fill=Rndcolor ())#Write interference circles         forIinchRange (40): Draw.point ([Random.randint (0, width), random.randint (0, height)], fill=Rndcolor ()) x=random.randint (0, width) y=random.randint (0, height) draw.arc ((x, y, x+ 4, Y + 4), 0, fill=Rndcolor ())#Draw Interference Lines         forIinchRange (5): X1=random.randint (0, width) y1=random.randint (0, height) x2=random.randint (0, width) y2=random.randint (0, height) draw.line ((x1, y1, x2, y2), fill=rndcolor ()) img=Img.filter (Imagefilter.edge_enhance_more)returnImg"'. Join (Code)

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Get Verification Code Background view

#post-encapsulation use    defCheckout (Request): fromIoImportBytesio fromUtils.checkcodeImportcheck_code img, code=Check_code () stream=Bytesio () Img.save (stream,'PNG') request.session['Code'] =CodereturnHttpResponse (Stream.getvalue ())

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[Oldboy-django] [2 in-depth Django] Login Registration page Verification Code