Add ability to upload files

README.md

@@ -143,6 +143,18 @@ REST web API for the [libgphoto2](http://www.gphoto.org) library. You can use it
     | `height`   | *integer*                                 | Returns the image scaled down to the given height                                                                                                     |
 
 - `DELETE /cameras/:id/blob/*filepath`
+- `PUT /cameras/:id/blob/*path`
+
+    Example request:
+
+    ```sh
+    curl \
+        -X PUT \
+        -H "Accept: application/json" \
+        -H "Content-Type: multipart/form-data" \
+        -F file="@/path/to/file.jpg" \
+        "http://localhost:3000/cameras/5a337150-30ba-40fd-adc2-b9ffacdad188/blob/store_00010001/DCIM007/IMG_0001.jpg"
+    ```
 
 #### `/cameras/:id/zip`
 

src/gphoto2/web/routes.cr

@@ -194,6 +194,29 @@ delete "/cameras/:id/blob/*filepath" do |env|
   send_204 env
 end
 
+put "/cameras/:id/blob/*filepath" do |env|
+  id = env.params.url["id"]
+  filepath = env.params.url["filepath"]
+  filepath = Path.posix("/", filepath)
+
+  upload = env.params.files["file"]? || raise ArgumentError.new("Missing file")
+  data = upload.tempfile.getb_to_end
+
+  GPhoto2::Web.camera_by_id(id) do |camera|
+    file = camera
+      .filesystem(filepath.dirname)
+      .put(filepath.basename, data)
+
+    env.response.headers["Vary"] = "Accept"
+
+    if request_accepts_json?(env.request)
+      send_json env, file
+    else
+      send_204 env
+    end
+  end
+end
+
 # /cameras/:id/zip
 
 get "/cameras/:id/zip" do |env|