Paul Not sure if this is helpful - I have not tried it out, but it may give you a pointer.
As Sven says, you need to parse a stream and be able to stop when you reach the desired point. If instead of Soup you use XMLHTMLParser, this has streaming siblings called SAXHTMLHandler and SAX2HTMLParser. I think it should be possible to use one or the other to stop when you reach the </head> tag. Personally I find the output of XMLHTMLParser easier to follow than that of Soup, but this may be a matter of taste. Hope this helps Peter Kenny -----Original Message----- From: Pharo-users [mailto:pharo-users-boun...@lists.pharo.org] On Behalf Of Sven Van Caekenberghe Sent: 26 November 2016 18:19 To: Any question about pharo is welcome <pharo-users@lists.pharo.org> Subject: Re: [Pharo-users] ZnClient GET, but just the content of the <head> tag? Paul, > On 26 Nov 2016, at 18:31, PAUL DEBRUICKER <pdebr...@gmail.com> wrote: > > This is a micro optimization if there ever was one but I wondered if it was possible to stop downloading and get the entity once the </head> tag has been received. > > Right now I download the whole page, parse it with Soup, then extract the tags I want from the head. Which works fine. e.g. > > head:=((Soup fromString: (ZnEasy get: 'http://pharo.org') entity) > findChildTag: 'html') findChildTag: 'head'. This would only be useful for large pages. Dealing with the content of resources (like parsing HTML) is outside the scope of Zinc. However, I can help you get started. What you want to do is use streaming. That gives you access to the content of a resource using a direct stream, so you could decide to stop reading (but then you have to close the connection, else you need to read everything anyway). Start by having a look at ZnClient>>#downloadTo: and ZnStreamingEntity. What you want to do is more or less the following. ZnClient new url: 'http://pharo.org'; streaming: true; get. At this point, the request is done, the response is in, but the entity of the response is not yet read. When you ask for the entity, you get a ZnStreamingEntity which holds the stream that you then have to read from. You can check the response (and its header) for meta info. Your next challenge then is to process this stream so that you can parse it in a real streaming fashion. I don't know if Soup can do this. Sven
