如果行键被颠倒过来，如何查找HBase REST API（Stargate） [英] How to lookup HBase REST API (Stargate) if the row-keys are reversed urls

问题描述

我正在使用nutch2.2.1 + hbase0.90.4，并希望通过 HBase访问数据REST API Stargate 。如果我使用url（例如www.usatoday.com）种子nutch，则反向链接将成为指定表（'网页'）中的HBase行键。我可以通过hbase shell查找数据，如下所示：

I am using nutch2.2.1 + hbase0.90.4, and wanting to access the data via the HBase REST API Stargate. If I seed nutch with a url (eg. www.usatoday.com), the reversed url becomes the HBase row-key in the designated table ('webpage'). I can lookup the data via the hbase shell as follows:

hbase(main):001:0> get 'webpage', 'com.usatoday.www:http/'
COLUMN                                         CELL                                                                                                                                 
 f:fi                                          timestamp=1404762373394,value=\x00'\x8D\x00                                                                                         
 f:ts                                          timestamp=1404762373394, value=\x00\x00\x01G\x12\\xB5\xB3                                                                            
 mk:_injmrk_                                   timestamp=1404762373394, value=y                                                                                                     
 mk:dist                                       timestamp=1404762373394, value=0                                                                                                     
 mtdt:_csh_                                    timestamp=1404762373394, value=?\x80\x00\x00                                                                                         
 s:s                                           timestamp=1404762373394, value=?\x80\x00\x00       

但是，我在使用REST API时遇到问题。据推测，我需要做一些非常简单的URL编码在'http'之前抑制冒号对我造成麻烦？

However, I am having trouble using the REST API. Presumably I need to do some pretty simple URL encoding to suppress the colon before 'http' that is making trouble for me?

例如，我得到一个HTTP 404我尝试

For eg., I get a HTTP 404 when I try

curl http://localhost:8900/webpage/com.usatoday.www:http/

当我尝试时

curl http://localhost:8900/webpage/com.usatoday.www%3Ahttp/

我知道REST API工作正常，因为我可以在名为'test'的表中创建一个名为'row3'的行并查找

I know that the REST API is working fine as I can create a row called 'row3' into a table called 'test' and lookup

curl http://localhost:8900/test/row3  

查看以下预期结果：

<?xml version="1.0" encoding="UTF-8" standalone="yes"?><CellSet><Row key="cm93Mw=="><Cell timestamp="1404761922130" column="Y2Y6Yw==">dGhpcyBpcyBzb3J0YSB3b3JraW5nIG5vdw==</Cell></Row></CellSet>

感谢您的帮助！

Thanks for the help!

推荐答案

URL也需要编码正斜杠。以下工作。

Needed to URL encode the forward slash as well. The following works.

curl http://localhost:8900/webpage/com.usatoday.www%3Ahttp%2F

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