python httplib2 超时以及一些问题

1、python连接一个网页

h = httplib2.Http()

res,con = h.request('http://www.xxx.com','GET')

但是发现，如果这个网站宕机了，那么这个就会停留很久很久，那么我如何快速知道这个问题呢，这个就是超时；

可以这么写：

h = httplib2.Http(timeout=0.1)

res,con = h.request('http://www.xxx.com','GET')

那么，0.1秒过去了，还没有反应就会知道是不是远程宕机了。Http里面的参数可不止这么一点点啊。

httplib2.Http(self, cache=None, timeout=None, proxy_info=None)

用help(httplib2.Http)就能看到

>>> help(httplib2.Http)

Help on class Http in module httplib2:

class Http(__builtin__.object)

| An HTTP client that handles:

|

| - all methods

| - caching

| - ETags

| - compression,

| - HTTPS

| - Basic

| - Digest

| - WSSE

|

| and more.

|

| Methods defined here:

|

| __getstate__(self)

|

| __init__(self, cache=None, timeout=None, proxy_info=<function proxy_info_fro

m_environment>, ca_certs=None, disable_ssl_certificate_validation=False)

| If 'cache' is a string then it is used as a directory name for

| a disk cache. Otherwise it must be an object that supports the

| same interface as FileCache.

|

| All timeouts are in seconds. If None is passed for timeout

| then Python's default timeout for sockets will be used. See

| for example the docs of socket.setdefaulttimeout():

| http://docs.python.org/library/socket.html#socket.setdefaulttimeout
|

| `proxy_info` may be:

| - a callable that takes the http scheme ('http' or 'https') and

| returns a ProxyInfo instance per request. By default, uses

| proxy_nfo_from_environment.

| - a ProxyInfo instance (static proxy config).

| - None (proxy disabled).

|

| ca_certs is the path of a file containing root CA certificates for SSL

| server certificate validation. By default, a CA cert file bundled with

| httplib2 is used.

|

| If disable_ssl_certificate_validation is true, SSL cert validation will

| not be performed.

|

| __setstate__(self, state)

|

| add_certificate(self, key, cert, domain)

| Add a key and cert that will be used

| any time a request requires authentication.

|

| add_credentials(self, name, password, domain='')

| Add a name and password that will be used

| any time a request requires authentication.

|

| clear_credentials(self)

| Remove all the names and passwords

| that are used for authentication

|

| request(self, uri, method='GET', body=None, headers=None, redirections=5, co

nnection_type=None)

| Performs a single HTTP request.

|

| The 'uri' is the URI of the HTTP resource and can begin with either

| 'http' or 'https'. The value of 'uri' must be an absolute URI.

|

| The 'method' is the HTTP method to perform, such as GET, POST, DELETE,

| etc. There is no restriction on the methods allowed.

|

| The 'body' is the entity body to be sent with the request. It is a

| string object.

|

| Any extra headers that are to be sent with the request should be

| provided in the 'headers' dictionary.

|

| The maximum number of redirect to follow before raising an

| exception is 'redirections. The default is 5.

|

| The return value is a tuple of (response, content), the first

| being and instance of the 'Response' class, the second being

| a string that contains the response entity body.

|

| ----------------------------------------------------------------------

| Data descriptors defined here:

|

| __dict__

| dictionary for instance variables (if defined)

|

| __weakref__

| list of weak references to the object (if defined)

2、对于python中处理IP地址这样的数据，是非常好处理的。

记得两个函数，一个是join，一个是split，那么这个问题非常容易解决。

int-->string，有一个函数str，这个我之前有讲过。

string-->int，直接强制转换就行了。