#Binary header for ipicture format pdf

In both cases you will see the same image, which is a simple red dot. This will display an image using Data URIs. Here is both an HTML5 and SAPUI5 XMLView example: by using Data URIs (basically Base64 encoded files). the rest of the header the same, and then do your output in binary format. In HTML5 there multiple ways of displaying images, i.e. This format can be used to make wonderful color pictures (and black & white). It’s not a general HTML5, OData, or SAPUI5 issue!īut how can we display the pictures from the Northwind service?. This won’t work because of MS OLE/Access as mentioned in the google groups article from above. that the file contains binary data and shouldnt be treated as 7-bit ASCII text.

#Binary header for ipicture format pdf

The 78 superfluous bytes are a proprietary OLE header that Access creates when saving bitmaps.įurthermore, because of this “corrupted file format” we can’t just use any of these (only for the Northwind service!): The basic structure of a PDF file is presented in the picture below. This is an artefact of Northwind’s Access heritage. See Extracting Northwind Odata Service images on google groups for some background informationn: However, renaming the file from $value to $value.bmp won’t help to open the file because it is kind of corrupted. If you check the content of the file (after you saved it on your disk as “$value”) you can tell that this must be a bitmap file. If pictures are the binary on and off representation of the pixels. Unfortunately, the Northwind service only sends Content-Type:application/octet-stream in the response header. Unless it is a very simple (uncompressed) image format, you simply cant do that. If you want the real binaries of a given picture you can simply call (1)/Picture/$value (try it in your browser). This also means that you will get the pictures per default when you request a list of all categories by calling $format=json or if you get one Category directly by calling (1)?$format=jsonĪs you can see the Picture property is actually returned as a String, in fact it’s the Base64 encoded file content. If you check the Category Entity of the V2 Northwind service you can see that each Category has a Property Picture of type Edm.Binary (see the $metadata).