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Improve getDataUri (#20670)

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* Improve getDataUri

* Restart ci

* https://github.com/nim-lang/Nim/pull/20670#issuecomment-1295937393
This commit is contained in:
Juan Carlos
2022-10-31 16:34:17 -03:00
committed by GitHub
parent 0b262e9496
commit 229f146280
1 changed files with 12 additions and 4 deletions
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16
lib/pure/uri.nim
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@@ -32,11 +32,11 @@ runnableExamples:
## ## Data URI Base64
runnableExamples:
doAssert getDataUri("Hello World", "text/plain") == "data:text/plain;charset=utf-8;base64,SGVsbG8gV29ybGQ="
doAssert getDataUri("Nim", "text/plain") == "data:text/plain;charset=utf-8;base64,Tmlt"
assert getDataUri("Hello World", "text/plain") == "data:text/plain;charset=utf-8;base64,SGVsbG8gV29ybGQ="
assert getDataUri("Nim", "text/plain") == "data:text/plain;charset=utf-8;base64,Tmlt"
import strutils, parseutils, base64
import std/[strutils, parseutils, base64]
import std/private/[since, decode_helpers]
when defined(nimPreviewSlimSystem):
@@ -540,4 +540,12 @@ proc getDataUri*(data, mime: string, encoding = "utf-8"): string {.since: (1, 3)
## * https://en.wikipedia.org/wiki/Data_URI_scheme
runnableExamples: static: assert getDataUri("Nim", "text/plain") == "data:text/plain;charset=utf-8;base64,Tmlt"
assert encoding.len > 0 and mime.len > 0 # Must *not* be URL-Safe, see RFC-2397
result = "data:" & mime & ";charset=" & encoding & ";base64," & base64.encode(data)
let base64encoded: string = base64.encode(data)
# ("data:".len + ";charset=".len + ";base64,".len) == 22
result = newStringOfCap(22 + mime.len + encoding.len + base64encoded.len)
result.add "data:"
result.add mime
result.add ";charset="
result.add encoding
result.add ";base64,"
result.add base64encoded