Added inputStream method to ITemplateResources #198
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…nary resources (images, etc) from templates folder by extensions
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The main reason for adding this is our usecase of using thymeleaf for e-mail templates.
To refer to images and other binary resources, I created an extension tag processor that reads the resource, adds it to a special container in a context, and outputs a "cid:unique-code" url to refer to the image. However I need to be able to load the resource as binary data, and ITemplateResource only has a
readermethod. I added aninputStreammethod to ITemplateResource and all its implementations in the thymeleaf and thymeleaf-spring repositories. I added a unit test so that this method has the same amount of testing as thereadermethod.(Since the
readermethods were all changes to use theinputStreammethod to avoid code duplication, the ability to load a resource at all also means that theinputStream()method worked, so it's implicitly tested in many more cases, just as thereadermethod is)This pull request has accompanying pull requests in thymeleaf-tests and thymeleaf repositories.