implement sqlpage.uploaded_file_mime_type

fixes #204

Author: lovasoa

CHANGELOG.md

@@ -12,6 +12,7 @@
  - New `embed` attribute in the `card` component that lets you build multi-column layouts of various components with cards.
   - ![](./examples/cards-with-remote-content/screenshot.png)
   - Added `id` and `class` attributes to all components, to make it easier to style them with custom CSS and to reference them in intra-page links and custom javascript code.
+ - Implemented [uploaded_file_mime_type](https://sql.ophir.dev/functions.sql?function=uploaded_file_mime_type#function)
 
 ## 0.17.1 (2023-12-10)
 

examples/official-site/sqlpage/migrations/23_uploaded_file_functions.sql

@@ -88,7 +88,7 @@ insert into uploaded_files (title, path) values (:title, $url);
 ),
 (
     'uploaded_file_mime_type',
-    '0.17.0',
+    '0.18.0',
     'file-settings',
     'Returns the MIME type of an uploaded file.
 

src/webserver/database/sql_pseudofunctions.rs

@@ -35,6 +35,7 @@ pub(super) enum StmtParam {
     SqlPageVersion,
     Literal(String),
     UploadedFilePath(String),
+    UploadedFileMimeType(String),
     ReadFileAsText(Box<StmtParam>),
     ReadFileAsDataUrl(Box<StmtParam>),
     Path,
@@ -95,6 +96,10 @@ pub(super) fn func_call_to_param(func_name: &str, arguments: &mut [FunctionArg])
         "protocol" => StmtParam::Protocol,
         "uploaded_file_path" => extract_single_quoted_string("uploaded_file_path", arguments)
             .map_or_else(StmtParam::Error, StmtParam::UploadedFilePath),
+        "uploaded_file_mime_type" => {
+            extract_single_quoted_string("uploaded_file_mime_type", arguments)
+                .map_or_else(StmtParam::Error, StmtParam::UploadedFileMimeType)
+        }
         "read_file_as_text" => StmtParam::ReadFileAsText(Box::new(extract_variable_argument(
             "read_file_as_text",
             arguments,
@@ -244,7 +249,7 @@ async fn read_file_as_data_url<'a>(
 }
 
 fn mime_from_upload<'a>(param0: &StmtParam, request: &'a RequestInfo) -> Option<&'a Mime> {
-    if let StmtParam::UploadedFilePath(name) = param0 {
+    if let StmtParam::UploadedFilePath(name) | StmtParam::UploadedFileMimeType(name) = param0 {
         request.uploaded_files.get(name)?.content_type.as_ref()
     } else {
         None
@@ -296,6 +301,12 @@ pub(super) fn extract_req_param_non_nested<'a>(
             .get(x)
             .and_then(|x| x.file.path().to_str())
             .map(Cow::Borrowed),
+        StmtParam::UploadedFileMimeType(x) => request
+            .uploaded_files
+            .get(x)
+            .and_then(|x| x.content_type.as_ref())
+            .map(|x| x.as_ref())
+            .map(Cow::Borrowed),
         StmtParam::ReadFileAsText(_) => bail!("Nested read_file_as_text() function not allowed",),
         StmtParam::ReadFileAsDataUrl(_) => {
             bail!("Nested read_file_as_data_url() function not allowed",)