I'm using std.json for the first time. I want to download the contents of a markdown file from a web server. When I do that, the line breaks are escaped, which I don't want. Here's an example:

import std.conv, std.json, std.stdio;

void main() {
	string data =
"This is a paragraph
with line breaks
that shouldn't appear
when the file is loaded
in a text editor.";
  string msg = JSONValue(["markdown": data]).toString;
  string msg2 = parseJSON(msg)["markdown"].to!string;
  writeln(data);
  writeln(msg2);
}

Output:

This is a paragraph
with line breaks
that shouldn't appear
when the file is loaded
in a text editor.
"This is a paragraph\nwith line breaks\nthat shouldn't appear\nwhen the file is loaded\nin a text editor."

On 11/05/2018 2:56 AM, bachmeier wrote:
> I'm using std.json for the first time. I want to download the contents of a markdown file from a web server. When I do that, the line breaks are escaped, which I don't want. Here's an example:
> 
> import std.conv, std.json, std.stdio;
> 
> void main() {
>      string data =
> "This is a paragraph
> with line breaks
> that shouldn't appear
> when the file is loaded
> in a text editor.";
>    string msg = JSONValue(["markdown": data]).toString;
>    string msg2 = parseJSON(msg)["markdown"].to!string;
>    writeln(data);
>    writeln(msg2);
> }
> 
> Output:
> 
> This is a paragraph
> with line breaks
> that shouldn't appear
> when the file is loaded
> in a text editor.
> "This is a paragraph\nwith line breaks\nthat shouldn't appear\nwhen the file is loaded\nin a text editor."

You'll need to unescape them (which is pretty easy, a simple replacement here).

For reference, this is invalid json[0]:

```
{
	"1
	2
	3 "
}
```

[0] https://jsonlint.com/

On Thursday, 10 May 2018 at 15:01:57 UTC, rikki cattermole wrote:

> You'll need to unescape them (which is pretty easy, a simple replacement here).
>
> For reference, this is invalid json[0]:
>
> ```
> {
> 	"1
> 	2
> 	3 "
> }
> ```
>
> [0] https://jsonlint.com/

So I see the answer is that I don't understand json. A search reveals that this is a common mistake.

On Thursday, 10 May 2018 at 15:01:57 UTC, rikki cattermole wrote:
> [snip]
>
> You'll need to unescape them (which is pretty easy, a simple replacement here).
>
> For reference, this is invalid json[0]:
>
> ```
> {
> 	"1
> 	2
> 	3 "
> }
> ```
>
> [0] https://jsonlint.com/

I don't see an unescape function in phobos and below doesn't seem to work

string msg2 = parseJSON(msg)["markdown"].to!string.replace("\n", " ");

On Thursday, 10 May 2018 at 17:59:26 UTC, jmh530 wrote:
> On Thursday, 10 May 2018 at 15:01:57 UTC, rikki cattermole wrote:
>> [snip]
>>
>> You'll need to unescape them (which is pretty easy, a simple replacement here).
>>
>> For reference, this is invalid json[0]:
>>
>> ```
>> {
>> 	"1
>> 	2
>> 	3 "
>> }
>> ```
>>
>> [0] https://jsonlint.com/
>
> I don't see an unescape function in phobos and below doesn't seem to work
>
> string msg2 = parseJSON(msg)["markdown"].to!string.replace("\n", " ");

I used replace("\\n", "\n")

On Thursday, 10 May 2018 at 18:21:17 UTC, bachmeier wrote:
> [snip]
>
> I used replace("\\n", "\n")

Ah, I always forget the extra \.