Скачать или смотреть Part 1 blob to base64 conversion Download images from Source, img html tag and Convert WebP to any i

learn how to get bloburl & base64 string of
image source or svg url using google
script and by pass CORS policy

1 first you need google script
2 need special function doGet
3 now deploy
4 convert it to test using JSON.stringify
5 so it is returning what we are sending as parameter
6 we are getting this result as object
contextPath, queryStringweburlwww.renault.co.in, parameterweburlwww.renault.co.in, parametersweburlwww.renault.co.in, contentLength-1.0
7 now we pass image url as parameter Source or img tag convert it to base64 string
8 this us our source url of images get one
9 this client side fetch function to get
blob but it will not work becoz CORS policy
& other domain 10 let run and see
no blob received therefore you cannot get
base64 string from this blob

10 steps to follow via google script GS

get BLOBCONVERT BASE64 STR GET BLOBURL
11 authroized the GS
12 we are getting blob
13 we are getting bytes array
14 we are getting base64 string
15 now convert it database64 string
16 set mimetype imagepng or imagejpeg
by this way you can convert webP image to pngjpegjpg
this us webP image
"https:cdn.group.renault.comreninkiger-new--tvcTablet.jpg.ximg.medium.webp18f4591025.webp, https:cdn.group.renault.comreninkiger-new--tvcTablet.jpg.ximg.mediumx2.webp18f4591025.webp 2x"
webP can be open in chrome browser
17 webP png jpeg jpg etc
as per mimetype of images*****
18 it is mandatroy to structure correctly
'data:imagepng';base64,'+base64url
19 copy paste this base64 in browser it is working
20 we have fetch images from other server bypassing the
CORS policy
21 convertion done webP png or jpeg
conversion in good quality
22 make html page and set this base64 string in it
and download this image directly on page load
using canvas & img tags

23 must knowledge of
javascript, google script, html etc
24 now send xmlhttp request using axios fetch jquery xmlHTTPRequest etc
for axios using cdn
25 deploy GS finaly
26 we sending image url with GS url as parameter and
get base64 string in response
27 we are using axio to send xmlhttprequest with cdn
28 let put this html file into ISS localhost
not work as we have changed default port
so we need to mention port number
29 we get base64 string check it now
30 DOWNLOAD IMAGE USN CANVAS & IMG TAG
31 we will learn download images from
excel VBA using the same javascript in
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