twisted web: 如何正确处理图像目录中的图像
我成功写了一个扭曲的网络服务器，可以显示动态生成的内容。不过，当我试图从一个文件夹里显示图片（png格式），比如说(~cwd/plots/image.png)的时候，服务器没有报错，但浏览器要么显示替代文本，要么显示一个损坏的图片图标。我到底哪里出错了呢？
import sys
from twisted.internet import reactor
import twisted.python.filepath
from twisted.web import server, resource, static
FILES = ["plot/10.53.174.1.png", "plot/10.53.174.2.png", "plot/10.53.174.3.png"]
class Child(resource.Resource):
def __init__(self,link, filename):
resource.Resource.__init__(self)
self.filename = filename
self.link = link
pass
def render(self, request ):
filepath = "/%s" % (self.filename)
linkpath = "%s%s" % (self.link, filepath)
self.getChild(linkpath, static.File(self.filename))
return """
<html><body> <head> <title>%s</title> </head> <body> <h1>%s</h1><br> <img src="%s" alt = "angry beaver" /> </body>""" % (self.link, self.link, linkpath)
class Toplevel(resource.Resource):
#addSlash = True
def render(self, request):
request.write("""<html><body> <head> <title>monitor server listing</title> </head> <body> <h1>Server List</h1> <ul>""" )
#assume a pre-validated list of plot file names. validate their presence anyway
if FILES:
for fileName in FILES:
if os.path.exists(fileName):
try:
link = fileName.split('.png')[0]
link = link.split('plot')[1]
path = link[1:]
request.write('<li> <a href="%s">%s</a><br>' % (link, link))
root.putChild(path, Child(link, fileName))
#root.putChild(path, Child(fileName))
except Exception as why:
request.write("%s <br>" % (str(why)))
else:
request.write(" you may think %s exists but it doesn't " % (fileName))
else:
request.write("""No files given""")
request.write("""</ul></body></html>""")
return ""
if __name__ == "__main__":
root = resource.Resource()
home = Toplevel()
png_file = twisted.python.filepath.FilePath('./plot/')
root.putChild('', home)
site = server.Site(root)
reactor.listenTCP(8007, site)
reactor.run()
1 个回答
1
- 首先：查看源代码，地址是 http://localhost:8007/10.53.174.1，你需要修改代码，以便正确显示图片的链接。
- 其次：使用 twisted.web.static.File 来提供静态内容。
修正后的代码：
import sys
import os
from twisted.internet import reactor
import twisted.python.filepath
from twisted.web.static import File
from twisted.web import server, resource, static
FILES = ["plot/10.53.174.1.png", "plot/10.53.174.2.png", "plot/10.53.174.3.png"]
class Child(resource.Resource):
def __init__(self,link, filename):
resource.Resource.__init__(self)
self.filename = filename
self.link = link
pass
def render(self, request ):
filepath = "/%s" % (self.filename)
linkpath = filepath
#linkpath = "%s%s" % (self.link, filepath)
self.getChild(linkpath, static.File(self.filename))
return """
<html><body> <head> <title>%s</title> </head> <body> <h1>%s</h1><br> <img src="%s" alt = "angry beaver" /> </body>""" % (self.link, self.link, linkpath)
class Toplevel(resource.Resource):
#addSlash = True
def render(self, request):
request.write("""<html><body> <head> <title>monitor server listing</title> </head> <body> <h1>Server List</h1> <ul>""" )
#assume a pre-validated list of plot file names. validate their presence anyway
if FILES:
for fileName in FILES:
request.write(fileName)
if os.path.exists(fileName):
try:
link = fileName.split('.png')[0]
link = link.split('plot')[1]
path = link[1:]
request.write('<li> <a href="%s">%s</a><br>' % (link, link))
root.putChild(path, Child(link, fileName))
#root.putChild(path, Child(fileName))
except Exception as why:
request.write("%s <br>" % (str(why)))
else:
request.write(" you may think %s exists but it doesn't " % (fileName))
else:
request.write("""No files given""")
request.write("""</ul></body></html>""")
return ""
if __name__ == "__main__":
root = resource.Resource()
home = Toplevel()
png_file = twisted.python.filepath.FilePath('./plot/')
plot_resource = File('./plot')
root.putChild('', home)
root.putChild('plot', plot_resource)
site = server.Site(root)
reactor.listenTCP(8007, site)
reactor.run()
附注：你的代码有点乱，可以改进一下。试着看看这个：