Add zoom-format

src/arguments.rs

@@ -116,6 +116,9 @@ pub struct Arguments {
  /// retrying partially failed downloads, or stitching the tiles with an external program.
  #[arg(short = 'c', long = "tile-cache")]
  pub tile_storage_folder: Option<PathBuf>,
+ /// A zoom_level image format suffix eg.default.png or default.jpg
+ #[arg(short = 'f', long = "zoom-format", default_value = "auto")]
+ pub zoom_format: String,
 }
 
 impl Default for Arguments {
@@ -140,6 +143,7 @@ impl Default for Arguments {
  connect_timeout: Duration::from_secs(6),
  logging: "warn".to_string(),
  tile_storage_folder: None,
+ zoom_format: "".to_string(),
  }
  }
 }

src/lib.rs

@@ -172,6 +172,7 @@ pub async fn dezoomify_level(
  retries: args.retries,
  retry_delay: args.retry_delay,
  tile_storage_folder: args.tile_storage_folder.clone(),
+ zoom_format: args.zoom_format.clone(),
  };
  let mut throttler = throttler::Throttler::new(args.min_interval);
  info!("Creating canvas");

src/network.rs

@@ -54,13 +54,27 @@ pub struct TileDownloader {
  pub retries: usize,
  pub retry_delay: Duration,
  pub tile_storage_folder: Option<PathBuf>,
+ pub zoom_format: String,
 }
 
 impl TileDownloader {
  pub async fn download_tile(
  &self,
- tile_reference: TileReference,
+ mut tile_reference: TileReference,
  ) -> Result<Tile, TileDownloadError> {
+ if !"auto".eq(&self.zoom_format) {
+ if let Ok(regx) = regex::Regex::new(r"default.*") {
+ let url = regx
+ .replace(
+ &tile_reference.url,
+ &format!("default.{}", self.zoom_format),
+ )
+ .to_string();
+
+ tile_reference.url = url
+ };
+ }
+
  // The initial delay after which a failed request is retried depends on the position of the tile
  // in order to avoid sending repeated "bursts" of requests to a server that is struggling
  let n = 100;