use actix_web::{ web, Responder, HttpRequest, HttpResponse}; use csv::Writer; pub async fn foo_csv(_req: HttpRequest) -> HttpResponse { let mut wtr = Writer::from_writer(vec![]); wtr.write_record(&["a", "b", "c"]); wtr.write_record(&["x", "y", "z"]); let v = wtr.into_inner().unwrap(); let data = String::from_utf8(v.clone()); println!("{:?}", data); HttpResponse::Ok().content_type("application/csv").body(data.unwrap()) }

https://docs.rs/csv/latest/csv/struct.Writer.html#method.into_inner

to set a file name HttpResponse::Ok().content_type("application/csv").append_header(("Content-Disposition","attachment; filename=abk_bulk.csv")).body(_data.unwrap()) 28.11.22

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