fix a partial FITS file download (Rust file handling has changed)

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "fits_web_ql"
-version = "4.1.3"
+version = "4.1.4"
 authors = ["jvo203 <[email protected]>"]
 edition = "2018"
 

htdocs/fitswebql/fitswebql.js

@@ -1,5 +1,5 @@
 function get_js_version() {
-	return "JS2019-02-08.2";
+	return "JS2019-02-09.0";
 }
 
 const wasm_supported = (() => {
@@ -9761,8 +9761,8 @@ function partial_fits_download(offsetx, offsety, width, height) {
 	url += "x1=" + Math.round(orig_x1) + "&y1=" + Math.round(orig_y2) + "&x2=" + Math.round(orig_x2) + "&y2=" + Math.round(orig_y1) + "&frame_start=" + data_band_lo + "&frame_end=" + data_band_hi + "&ref_freq=" + RESTFRQ;
 
 	//console.log(url) ;
-	window.location.assign(url);
-	//window.open(url, '_blank');
+	//window.location.assign(url);
+	window.open(url, '_blank');
 }
 
 function ok_download() {

src/fits.rs

@@ -1675,7 +1675,7 @@ impl FITS {
             let line = match std::str::from_utf8(slice) {
                 Ok(x) => x,
                 Err(err) => {
-                    println!("non-UTF8 characters found: {}", err);
+                    println!("non-UTF8 characters found: {}, bytes: {:?}", err, slice);
                     return true;
                 }
             };
@@ -5922,6 +5922,12 @@ impl FITS {
             return None;
         }
 
+        //reset the file
+        if let Err(err) = f.seek(SeekFrom::Start(0)) {
+            println!("CRITICAL ERROR seeking within the FITS file: {}", err);
+            return None;
+        }
+
         let mut header_end: bool = false;
 
         while !header_end {
@@ -6110,6 +6116,12 @@ impl FITS {
             return None;
         }
 
+        //reset the file
+        if let Err(err) = f.seek(SeekFrom::Start(0)) {
+            println!("CRITICAL ERROR seeking within the FITS file: {}", err);
+            return None;
+        }
+
         let mut header_end: bool = false;
 
         while !header_end {

src/main.rs

@@ -2252,8 +2252,8 @@ lazy_static! {
 #[cfg(feature = "server")]
 static LOG_DIRECTORY: &'static str = "LOGS";
 
-static SERVER_STRING: &'static str = "FITSWebQL v4.1.3";
-static VERSION_STRING: &'static str = "SV2019-02-08.0";
+static SERVER_STRING: &'static str = "FITSWebQL v4.1.4";
+static VERSION_STRING: &'static str = "SV2019-02-09.0";
 static WASM_STRING: &'static str = "WASM2019-02-08.1";
 
 #[cfg(not(feature = "server"))]