1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
Introduction
============
httplib2 is a comprehensive HTTP client library, httplib2.py supports many
features left out of other HTTP libraries.
###HTTP and HTTPS
HTTPS support is only available if the socket module was
compiled with SSL support.
###Keep-Alive
Supports HTTP 1.1 Keep-Alive, keeping the socket open and
performing multiple requests over the same connection if
possible.
###Authentication
The following three types of HTTP Authentication are
supported. These can be used over both HTTP and HTTPS.
* Digest
* Basic
* WSSE
###Caching
The module can optionally operate with a private cache that
understands the Cache-Control: header and uses both the ETag
and Last-Modified cache validators.
###All Methods
The module can handle any HTTP request method, not just GET
and POST.
###Redirects
Automatically follows 3XX redirects on GETs.
###Compression
Handles both 'deflate' and 'gzip' types of compression.
###Lost update support
Automatically adds back ETags into PUT requests to resources
we have already cached. This implements Section 3.2 of
Detecting the Lost Update Problem Using Unreserved Checkout.
###Unit Tested
A large and growing set of unit tests.
Installation
============
The httplib2 module is shipped as a distutils package. To install
the library, unpack the distribution archive, and issue the following
command:
$ python setup.py install
Usage
=====
A simple retrieval:
```python
import httplib2
h = httplib2.Http(".cache")
(resp_headers, content) = h.request("http://example.org/", "GET")
```
The 'content' is the content retrieved from the URL. The content
is already decompressed or unzipped if necessary.
To PUT some content to a server that uses SSL and Basic authentication:
```python
import httplib2
h = httplib2.Http(".cache")
h.add_credentials('name', 'password')
(resp, content) = h.request("https://example.org/chapter/2",
"PUT", body="This is text",
headers={'content-type':'text/plain'} )
```
Use the Cache-Control: header to control how the caching operates.
```python
import httplib2
h = httplib2.Http(".cache")
(resp, content) = h.request("http://bitworking.org/", "GET")
...
(resp, content) = h.request("http://bitworking.org/", "GET",
headers={'cache-control':'no-cache'})
```
The first request will be cached and since this is a request
to bitworking.org it will be set to be cached for two hours,
because that is how I have my server configured. Any subsequent
GET to that URI will return the value from the on-disk cache
and no request will be made to the server. You can use the
Cache-Control: header to change the caches behavior and in
this example the second request adds the Cache-Control:
header with a value of 'no-cache' which tells the library
that the cached copy must not be used when handling this request.
|
