Initial draft for HTTP file upload.

src/upload.rs

@@ -0,0 +1,17 @@
+use crate::context::Context;
+use crate::error::{bail, Result};
+use async_std::path::PathBuf;
+
+/// Upload file to a HTTP upload endpoint.
+pub async fn upload_file(_context: &Context, endpoint: String, file: PathBuf) -> Result<String> {
+    // TODO: Use tokens for upload, encrypt file with PGP.
+    let response = surf::post(endpoint).body_file(file)?.await;
+    if let Err(err) = response {
+        bail!("Upload failed: {}", err);
+    }
+    let mut response = response.unwrap();
+    match response.body_string().await {
+        Ok(string) => Ok(string),
+        Err(err) => bail!("Invalid response from upload: {}", err),
+    }
+}