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Capture the output of a fresh run
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Tom Scavo authored May 2, 2017
1 parent 53f31a8 commit 385a4d8
Showing 1 changed file with 28 additions and 19 deletions.
47 changes: 28 additions & 19 deletions README.md
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Expand Up @@ -69,32 +69,32 @@ Now GET the first resource:

```Shell
$ $BIN_DIR/cget.sh $url1 > /dev/null
2017-05-02T13:24:57Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
2017-05-02T13:26:11Z INFO conditional_get received response code: 200
2017-05-02T13:26:11Z INFO conditional_get writing cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
2017-05-02T13:26:12Z INFO conditional_get reading cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
2017-05-02T15:29:35Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
2017-05-02T15:29:41Z INFO conditional_get received response code: 200
2017-05-02T15:29:41Z INFO conditional_get writing cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
2017-05-02T15:29:41Z INFO conditional_get reading cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
$ echo $?
0
$ ls -1 $CACHE_DIR
1e6b844a49d1850b82feded72cf83ed7_content
1e6b844a49d1850b82feded72cf83ed7_headers
$ cat $CACHE_DIR/1e6b844a49d1850b82feded72cf83ed7_headers
HTTP/1.1 200 OK
Date: Wed, 26 Apr 2017 16:29:44 GMT
Date: Tue, 02 May 2017 15:29:34 GMT
Server: Apache
Last-Modified: Tue, 25 Apr 2017 19:14:05 GMT
ETag: "299866f-54e0286fb789a"
Last-Modified: Mon, 01 May 2017 19:02:13 GMT
ETag: "29bcdb4-54e7b0fa340c5"
Accept-Ranges: bytes
Content-Length: 43615855
Content-Length: 43765172
Content-Type: application/samlmetadata+xml
```

Assuming the resource doesn't change on the server, subsequent requests will return the cached resource. To bypass the network altogether, use the ``-C`` option:

```Shell
$ $BIN_DIR/cget.sh -C $url1 | wc -c
2017-05-02T13:27:07Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
2017-05-02T13:27:07Z INFO conditional_get reading cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
2017-05-02T15:30:39Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
2017-05-02T15:30:39Z INFO conditional_get reading cached content file: /tmp/http_cache/1e6b844a49d1850b82feded72cf83ed7_content
43765172
```

Expand All @@ -103,8 +103,8 @@ Of course the ``-C`` option will fail if the resource is not cached:
```Shell
# illustrate "quiet failure mode"
$ $BIN_DIR/cget.sh -C $url2
2017-05-02T14:53:38Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-fallback.xml
2017-05-02T14:53:38Z ERROR conditional_get: resource not cached: http://md.incommon.org/InCommon/InCommon-metadata-fallback.xml
2017-05-02T15:31:07Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-fallback.xml
2017-05-02T15:31:07Z ERROR conditional_get: resource not cached: http://md.incommon.org/InCommon/InCommon-metadata-fallback.xml
$ echo $?
1
```
Expand All @@ -114,9 +114,9 @@ OTOH, the ``-F`` option forces the return of a fresh resource from the server. I
```Shell
# further illustrate "quiet failure mode"
$ $BIN_DIR/cget.sh -F $url1
2017-05-02T14:54:37Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
2017-05-02T14:54:38Z INFO conditional_get received response code: 304
2017-05-02T14:54:38Z ERROR conditional_get: resource not modified: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
2017-05-02T15:31:42Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
2017-05-02T15:31:48Z INFO conditional_get received response code: 304
2017-05-02T15:31:48Z ERROR conditional_get: resource not modified: http://md.incommon.org/InCommon/InCommon-metadata-preview.xml
$ echo $?
1
```
Expand All @@ -125,17 +125,26 @@ The ``-F`` option will work on the other URL, however:

```Shell
$ $BIN_DIR/cget.sh -F $url2 > /dev/null
2017-05-02T14:55:24Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-fallback.xml
2017-05-02T14:55:30Z INFO conditional_get received response code: 200
2017-05-02T14:55:30Z INFO conditional_get writing cached content file: /tmp/http_cache/1727196e5b7593f3b7528c539e7169d2_content
2017-05-02T14:55:30Z INFO conditional_get reading cached content file: /tmp/http_cache/1727196e5b7593f3b7528c539e7169d2_content
2017-05-02T15:32:27Z INFO cget.sh requesting resource: http://md.incommon.org/InCommon/InCommon-metadata-fallback.xml
2017-05-02T15:32:32Z INFO conditional_get received response code: 200
2017-05-02T15:32:32Z INFO conditional_get writing cached content file: /tmp/http_cache/1727196e5b7593f3b7528c539e7169d2_content
2017-05-02T15:32:32Z INFO conditional_get reading cached content file: /tmp/http_cache/1727196e5b7593f3b7528c539e7169d2_content
$ echo $?
0
$ ls -1 $CACHE_DIR
1727196e5b7593f3b7528c539e7169d2_content
1727196e5b7593f3b7528c539e7169d2_headers
1e6b844a49d1850b82feded72cf83ed7_content
1e6b844a49d1850b82feded72cf83ed7_headers
$ cat $CACHE_DIR/1727196e5b7593f3b7528c539e7169d2_headers
HTTP/1.1 200 OK
Date: Tue, 02 May 2017 15:32:26 GMT
Server: Apache
Last-Modified: Mon, 01 May 2017 19:02:13 GMT
ETag: "29bcdb4-54e7b0fa246c3"
Accept-Ranges: bytes
Content-Length: 43765172
Content-Type: application/samlmetadata+xml
```

See the inline help file for details:
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