Merge 08f40f30ce into 784bf53425

docs/configuration.md

@@ -1571,6 +1571,7 @@ Examples:
 | Name | Type | Required | Default |
 | ---- | ---- | -------- | ------- |
 | url | string | no | |
+| host | string | no | |
 | headers | key (string) & value (string) | no | |
 | method | string | no | GET |
 | body-type | string | no | json |
@@ -1595,6 +1596,9 @@ headers:
   Accept: application/json
 ```
 
+##### `host`
+Optionally specify the `Host` header that will be sent with the request. This is useful when `url` points to a reverse proxy. Note that setting the `Host` header in `headers` has no effect.
+
 ##### `method`
 The HTTP method to use when making the request. Possible values are `GET`, `POST`, `PUT`, `PATCH`, `DELETE`, `OPTIONS` and `HEAD`.
 

docs/custom-api.md

@@ -410,7 +410,7 @@ In some instances, you may need to make two consecutive API calls, where you use
     {{ $something.JSON.String "title" }}
 ```
 
-Here, `$theID` gets retrieved from the result of the first API call and used in the second API call. The `newRequest` function creates a new request, and the `getResponse` function executes it. You can also use `withParameter` and `withHeader` to optionally add parameters and headers to the request.
+Here, `$theID` gets retrieved from the result of the first API call and used in the second API call. The `newRequest` function creates a new request, and the `getResponse` function executes it. You can also use `withParameter` and `withHeader` to optionally add parameters and headers to the request. Note that `Host` header added using `withHeader` has no effect. You can use `withHost` to set the `Host` header. 
 
 If you need to make a request to a URL that requires dynamic parameters, you can omit the `url` property in the YAML and run the request entirely from within the template itself:
 

internal/glance/widget-custom-api.go

@@ -30,6 +30,7 @@ type CustomAPIRequest struct {
 	URL                string               `yaml:"url"`
 	AllowInsecure      bool                 `yaml:"allow-insecure"`
 	Headers            map[string]string    `yaml:"headers"`
+	Host               string               `yaml:"host"`
 	Parameters         queryParametersField `yaml:"parameters"`
 	Method             string               `yaml:"method"`
 	BodyType           string               `yaml:"body-type"`
@@ -182,6 +183,10 @@ func (req *CustomAPIRequest) initialize() error {
 		return err
 	}
 
+	if req.Host != "" {
+		httpReq.Host = req.Host
+	}
+
 	if len(req.Parameters) > 0 {
 		httpReq.URL.RawQuery = req.Parameters.toQueryString()
 	}
@@ -690,6 +695,10 @@ var customAPITemplateFuncs = func() template.FuncMap {
 			req.Headers[key] = value
 			return req
 		},
+		"withHost": func(value string, req *CustomAPIRequest) *CustomAPIRequest {
+			req.Host = value
+			return req
+		},
 		"withParameter": func(key, value string, req *CustomAPIRequest) *CustomAPIRequest {
 			if req.Parameters == nil {
 				req.Parameters = make(queryParametersField)