• aberba (5/5) Jul 30 2020 So I have a base64 image url string and I'm trying to generate a
• Adam D. Ruppe (17/20) Jul 30 2020 I don't think I wrote it as a library yet, but the idea is pretty
• aberba (3/19) Jul 30 2020 Thank Adam.

aberba <karabutaworld gmail.com> writes:

So I have a base64 image url string and I'm trying to generate a 
png,jpg image file from it.

I'm able to decode it to a buffer but the trouble is getting it 
from buffer to an actual image file. Any library function 
combination I can use?

Adam D. Ruppe <destructionator gmail.com> writes:

On Thursday, 30 July 2020 at 12:22:46 UTC, aberba wrote:
 I'm able to decode it to a buffer but the trouble is getting it 
 from buffer to an actual image file. Any library function 
 combination I can use?

I don't think I wrote it as a library yet, but the idea is pretty 
simple: they all start with "data:" so you look for that.

Then there's a type after that, so you read the string until the 
next ; character. It will be like image/png or image/jpeg.

Then there's the semicolon and the string "base64,".

After that, the rest of the string is base64 data.

```
import std.base64;
ubyte[] data = Base64.decode(rest_of_string);
```

And now that you have the data you can write it to a file:

```
import std.file;
std.file.write("filename.png", data);
```

And that should make the file you want.

aberba <karabutaworld gmail.com> writes:

On Thursday, 30 July 2020 at 12:28:08 UTC, Adam D. Ruppe wrote:
 On Thursday, 30 July 2020 at 12:22:46 UTC, aberba wrote:
 [...]

 I don't think I wrote it as a library yet, but the idea is 
 pretty simple: they all start with "data:" so you look for that.

 Then there's a type after that, so you read the string until 
 the next ; character. It will be like image/png or image/jpeg.

 Then there's the semicolon and the string "base64,".

 After that, the rest of the string is base64 data.

 ```
 import std.base64;
 ubyte[] data = Base64.decode(rest_of_string);
 ```

 And now that you have the data you can write it to a file:

⅞iii> import std.file;
 std.file.write("filename.png", data);
 ```

 And that should make the file you want.

Thank Adam.