Django 验证码的现实问题

[八哥Jerry]

views.py如下：
@login_required
def get_check_code_image(request):
"""
background #随机背景颜色
line_color #随机干扰线颜色
img_width = #画布宽度
img_height = #画布高度
font_color = #验证码字体颜色
font_size = #验证码字体尺寸
font = I#验证码字体
"""
import Image, ImageDraw, ImageFont, random
string = {'number':'12345679',
'litter':'ACEFGHKMNPRTUVWXY'}
background = (random.randrange(230,255),random.randrange(230,255),random.randrange(230,255))
line_color = (random.randrange(0,255),random.randrange(0,255),random.randrange(0,255))
img_width = 58
img_height = 30
font_color = ['black','darkblue','darkred']
font_size = 14
font = ImageFont.truetype('msyh.ttf',font_size)
request.session['verify'] = ''

#新建画布
im = Image.new('RGB',(img_width,img_height),background)
draw = ImageDraw.Draw(im)
code = random.sample(string['litter'],4)
#code = u'和谐社会'
#新建画笔
draw = ImageDraw.Draw(im)
#画干扰线
for i in range(random.randrange(3,5)):
xy = (random.randrange(0,img_width),random.randrange(0,img_height),
random.randrange(0,img_width),random.randrange(0,img_height))
draw.line(xy,fill=line_color,width=1)

#写入验证码文字
x = 2
for i in code:
y = random.randrange(0,10)
draw.text((x,y), i, font=font, fill=random.choice(font_color))
x += 14
request.session['verify'] += i
del x
del draw
buf = cStringIO.StringIO()
im.save(buf,'gif')
buf.seek(0)
print str(request.session['verify'])
return HttpResponse(buf.getvalue(),'image/gif')


urls.py如下：
#Check code
url(r'^get_check_code_image/$', 'blog.views.get_check_code_image',name='get_check_code_image'),


html：

<img onclick="this.setAttribute('src','/blog/get_check_code_image/?nocache='+Math.random());" src="/blog/get_check_code_image/" alt="CheckCode"/>


本地测试没有问题 ，能显示出来，但是挂上服务器，就显示不出来。
我用firefox的fireBug看了下，提示“加载指定URL失败”
不知道咋办了？

[iambic]

重贴代码。

[八哥Jerry]

view.py:

@login_required
def get_check_code_image(request):
  """
  background #随机背景颜色
  line_color #随机干扰线颜色
  img_width = #画布宽度
  img_height = #画布高度
  font_color = #验证码字体颜色
  font_size = #验证码字体尺寸
  font = I#验证码字体
  """
  import Image, ImageDraw, ImageFont, random  
  string = {'number':'12345679',
  'litter':'ACEFGHKMNPRTUVWXY'}
  background = (random.randrange(230,255),random.randrange(230,255),random.randrange(230,255))
  line_color = (random.randrange(0,255),random.randrange(0,255),random.randrange(0,255))
  img_width = 58
  img_height = 30  
  font_color = ['black','darkblue','darkred']
  font_size = 14
  font = ImageFont.truetype('msyh.ttf',font_size)
  request.session['verify'] = ''
  
  #新建画布
  im = Image.new('RGB',(img_width,img_height),background)
  draw = ImageDraw.Draw(im)
  code = random.sample(string['litter'],4)
  #code = u'和谐社会'
  #新建画笔
  draw = ImageDraw.Draw(im)
  #画干扰线
  for i in range(random.randrange(3,5)):
  xy = (random.randrange(0,img_width),random.randrange(0,img_height),
  random.randrange(0,img_width),random.randrange(0,img_height))
  draw.line(xy,fill=line_color,width=1)
    
  #写入验证码文字
  x = 2
  for i in code:
  y = random.randrange(0,10)
  draw.text((x,y), i, font=font, fill=random.choice(font_color))
  x += 14
  request.session['verify'] += i
  del x
  del draw
  buf = cStringIO.StringIO()
  im.save(buf,'gif')
  buf.seek(0)
  print str(request.session['verify'])
  return HttpResponse(buf.getvalue(),'image/gif')

[八哥Jerry]

urls.py

 #Check code
  url(r'^get_check_code_image/$', 'blog.views.get_check_code_image',name='get_check_code_image'),

[八哥Jerry]

HTML:

 <img onclick="this.setAttribute('src','/blog/get_check_code_image/?nocache='+Math.random());"	src="/blog/get_check_code_image/" alt="CheckCode"/>

本地测试都没有问题。传到服务器就不能显示。FireBug提示“加载指定URL失败”。

[tianze]

请问。后端如何验证？

[CrySleeper]

在浏览器里直接输入http://xxxxxxxx/blog/get_check_code_image/ 看看django的调试信息。