Path: csiph.com!weretis.net!feeder8.news.weretis.net!news.mb-net.net!open-news-network.org!.POSTED.50.226.197.178.dynamic.wless.zhbmb00p-cgnat.res.cust.swisscom.ch!not-for-mail From: Thomas 'PointedEars' Lahn Newsgroups: comp.lang.javascript Subject: Re: blob from createobjecturl Date: Sun, 24 Jan 2021 22:26:30 +0100 Organization: PointedEars Software (PES) Lines: 54 Message-ID: <3096479.44csPzL39Z@PointedEars.de> References: <6sednXpeKZTIepH9nZ2dnUU7-UHNnZ2d@westnet.com.au> <4594399.GXAFRqVoOG@PointedEars.de> <-tudnfIaWbymRpD9nZ2dnUU7-S_NnZ2d@westnet.com.au> Reply-To: Thomas 'PointedEars' Lahn Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8Bit Injection-Info: gwaiyur.mb-net.net; posting-host="50.226.197.178.dynamic.wless.zhbmb00p-cgnat.res.cust.swisscom.ch:178.197.226.50"; logging-data="10203"; mail-complaints-to="abuse@open-news-network.org" User-Agent: KNode/4.14.10 Cancel-Lock: sha1:xbMeET9cfSAMpRch7KgbbrTjWks= X-Face: %i>XG-yXR'\"2P/C_aO%~;2o~?g0pPKmbOw^=NT`tprDEf++D.m7"}HW6.#=U:?2GGctkL,f89@H46O$ASoW&?s}.k+&. On 24/01/2021 3:01 pm, Thomas 'PointedEars' Lahn wrote: >> Andrew Poulos wrote: >>> A web page I'm working on create a number of images using >>> >>> fetch(url) >>> .then(response => { >>> return response.blob(); ^^^^^^^^^^^^^^^^^^^^^^^ >>> }) >>> .then(b => { >>> myImage.src = URL.createObjectURL(b); >>> }) >>> .catch(err => console.log(err)); >>> >>> The user can create/destroy as many images as they want. >>> >>> If at some point the user wants to save an image, the page needs to send >>> it to the server. Is it ok to send myImage.src to a PHP server and the >>> server can correctly handle it or do I need to send the blob that was >>> used to create the object URL? >> >> Can the user modify the image? If not, and the server where the image is >> stored is the same from which it was obtained, then simply PUT or POST >> the original URI and let the server map that to the local filesystem. >> This is much less expensive than PUTting/POSTing the BLOB. > > Too easy :-) Thanks, You’re welcome :) > I posted the original URI and the server handled it. One thing to keep in mind, though: This will use the image resource *as retrievable at the time of POST*, not at the time of GET. So if it has changed or has become unavailable in the meantime, then the change/unavailability will be propagated to the user’s image album. For a *snapshot*, you have to PUT or POST the BLOB as formerly retrieved by the client. >> Otherwise PUT or POST the BLOB and let the server handle that. > > The created BLOB isn't saved (whereas the URI is) so I would have to > fetch it again. You would just have to save it before you now return it, provided you have control over that part of the code. See above. -- PointedEars FAQ: | | Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.