Hello everyone,
I found this snippet on https://dlang.org/phobos/std_net_curl.html#.HTTP

> import std.net.curl : HTTP;
> import std.stdio : writeln;
> 
> void main()
> {
>     auto http = HTTP();
>     // Track progress
>     http.method = HTTP.Method.get;
>     http.url = "https://upload.wikimedia.org/wikipedia/commons/5/53/Wikipedia-logo-en-big.png";
>     http.onReceive = (ubyte[] data) { return data.length; };
>     http.onProgress = (size_t dltotal, size_t dlnow, size_t ultotal, size_t ulnow) {
>         writeln("Progress ", dltotal, ", ", dlnow, ", ", ultotal, ", ", ulnow);
>         return 0;
>     };
>     http.perform();
> }

This snippet is showing Download Progress in bytes, but I'm unsure how to save the
downloaded file into filesystem after download is completed.

On Tue, Aug 20, 2019 at 1:40 PM BoQsc via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com> wrote:
>
> Hello everyone,
> I found this snippet on
> https://dlang.org/phobos/std_net_curl.html#.HTTP
>
> > import std.net.curl : HTTP;
> > import std.stdio : writeln;
> >
> > void main()
> > {
> >     auto http = HTTP();
> >     // Track progress
> >     http.method = HTTP.Method.get;
> >     http.url =
> > "https://upload.wikimedia.org/wikipedia/commons/5/53/Wikipedia-logo-en-big.png";
> >     http.onReceive = (ubyte[] data) { return data.length; };
> >     http.onProgress = (size_t dltotal, size_t dlnow, size_t
> > ultotal, size_t ulnow) {
> >         writeln("Progress ", dltotal, ", ", dlnow, ", ",
> > ultotal, ", ", ulnow);
> >         return 0;
> >     };
> >     http.perform();
> > }
>
> This snippet is showing Download Progress in bytes, but I'm
> unsure how to save the
> downloaded file into filesystem after download is completed.

You just need to save data in onReceive callback

On Tue, Aug 20, 2019 at 1:46 PM Daniel Kozak <kozzi11@gmail.com> wrote:
>
> On Tue, Aug 20, 2019 at 1:40 PM BoQsc via Digitalmars-d-learn <digitalmars-d-learn@puremagic.com> wrote:
> >
> > Hello everyone,
> > I found this snippet on
> > https://dlang.org/phobos/std_net_curl.html#.HTTP
> >
> > > import std.net.curl : HTTP;
> > > import std.stdio : writeln;
> > >
> > > void main()
> > > {
> > >     auto http = HTTP();
> > >     // Track progress
> > >     http.method = HTTP.Method.get;
> > >     http.url =
> > > "https://upload.wikimedia.org/wikipedia/commons/5/53/Wikipedia-logo-en-big.png";
> > >     http.onReceive = (ubyte[] data) { return data.length; };
> > >     http.onProgress = (size_t dltotal, size_t dlnow, size_t
> > > ultotal, size_t ulnow) {
> > >         writeln("Progress ", dltotal, ", ", dlnow, ", ",
> > > ultotal, ", ", ulnow);
> > >         return 0;
> > >     };
> > >     http.perform();
> > > }
> >
> > This snippet is showing Download Progress in bytes, but I'm
> > unsure how to save the
> > downloaded file into filesystem after download is completed.
>
> You just need to save data in onReceive callback

For that you can use https://dlang.org/phobos/std_file#append

On Tuesday, 20 August 2019 at 11:51:03 UTC, Daniel Kozak wrote:
> For that you can use https://dlang.org/phobos/std_file#append

Thank you, seems to work.

> import std.net.curl : HTTP;
> import std.stdio    : writeln;
> import std.file     : append;
> 
> void main()
> {
>     auto http = HTTP();
>     // Track progress
>     http.method = HTTP.Method.get;
>     http.url = "https://upload.wikimedia.org/wikipedia/commons/5/53/Wikipedia-logo-en-big.png";
>     http.onReceive = (ubyte[] data) {
>         append("Wikipedia-logo-en-big.png", data);
>         return data.length;
>     };
>     http.onProgress = (size_t dltotal, size_t dlnow, size_t ultotal, size_t ulnow) {
>         writeln("Progress ", dltotal, ", ", dlnow, ", ", ultotal, ", ", ulnow);
>         return 0;
>     };
>     http.perform();
> }

On Tuesday, 20 August 2019 at 11:51:03 UTC, Daniel Kozak wrote:
> For that you can use https://dlang.org/phobos/std_file#append

Don't do that. It will reopen and close the file on every received chunk. Not only is it slow, but if the file is renamed/moved/deleted while the download is occurring, the file will be corrupted. The same will happen if you run the program twice, if you don't clean up.

The correct way is to open a File once, then use rawWrite for every received chunk.