problems pulling data from a url..
Locked
problems pulling data from a url..
 
|
i am currently using HTTPSocket to pull data from a url...
looks like this: | data | data := String fromByteArray: (HTTPSocket httpGet: anUrl). i end up with a string that has my desired data (a JSON string), but, it's preceeded by this: 'a RWBinaryOrTextStream ' '<here is the stuff i need>' ' ' i am trying to lop off the first part by doing: jsonData := dataString replaceAll: 'RWBinaryOrTextStream' with: 'test'. just to see if i can touch the string.. but no matter what i do, i can't get any parts of the string to be raplaced.. it almost looks like there are three strings in there.. the RWBinaryOrTextStream one, the one i need, and an empty one.. is there a better way to pull a url? thanks! -- ---- peace, sergio photographer, journalist, visionary http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101 _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
|
|
Hi Sergio,
2010/3/24 sergio_101 <[hidden email]> i am currently using HTTPSocket to pull data from a url... the problem here is that HTTPSocket httpGet: '' return a RWBinaryOrTextStream.
To get the string, you need to send the message contents to the stream. (HTTPSocket httpGet: 'json url') contents
yes because it's a stream, not a string. hth, Cédrick
-- Cédrick _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
Re: problems pulling data from a url..
|
|
In reply to this post by sergio_101-2
(HTTPSocket httpGet: aUrl) contents
I know we Smalltalkers like to talk about how no one ever gets confused about dynamic types, but it does happen ;-). The stream has the text you want. May want to familiarize yourself with core methods on the Stream hierarchy. Pushing the Stream through a ByteArray conversion is invoking printString. Your trouble with getting a modified string using replaceAll: is again a subtle typing error: Reading the comment for #replaceAll:with: "Replace all occurences of oldObject with newObject" But, Strings are collections of characters, not strings. Compare: 'foo' replaceAll: 'f' with: 'g' 'foo' replaceAll: $f with: $g Take a look at senders of #findString: Many of them do replacements of substrings. David Mitchell http://www.withaguide.com On Wed, Mar 24, 2010 at 12:44 AM, sergio_101 <[hidden email]> wrote: i am currently using HTTPSocket to pull data from a url... _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
Re: problems pulling data from a url..
|
|
In reply to this post by cedreek
> the problem here is that HTTPSocket httpGet: '' return
> a RWBinaryOrTextStream. > To get the string, you need to send the message contents to the stream. > (HTTPSocket httpGet: 'json url') contents > thanks! just getting back to this.. my question is.. how do i know what part of the stream to look at? as in, how would i know that contents is the part i am interested in? thanks! oh.. and i am reading the docs about streams again... thanks again! -- ---- peace, sergio photographer, journalist, visionary http://www.coffee-black.com http://www.painlessfrugality.com http://www.twitter.com/sergio_101 http://www.facebook.com/sergio101 _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
|
|
Not sure I understand... :) A stream encapsulates a collection and provide facilities to navigate forward, backward, etc... (strings are collection - direct string manipulation aren't efficient)... So you use a stream to manipulate efficiently your string, and to get the string back (or whatever collection that was associated to the string), you send the message #contents.
If you se the class comment of Stream "I am an abstract class that represents an accessor for a sequence of objects. This sequence is referred to as my "contents"."
hth, -- -- Cédrick _______________________________________________ Beginners mailing list [hidden email] http://lists.squeakfoundation.org/mailman/listinfo/beginners |
«
Return to Squeak - Beginners
|
1 view|%1 views
| Free forum by Nabble | Edit this page |