Added declarations for content-disposition (#13191)

* Added declarations for content-disposition

* Fixed missing semicolon

* Added empty function

* Made ContentDisposition an interface instead of a class

* Filename may be undefined but not void

content-disposition/content-disposition-tests.ts

@@ -0,0 +1,10 @@
+import contentDisposition = require("content-disposition");
+
+const noParams = contentDisposition();
+const withFilenameNoOptions = contentDisposition("EURO rates.txt");
+const withFilenameAndOptions = contentDisposition("€ rates.txt", { type: "attachment", fallback: "EURO rates.txt" });
+const noFilename = contentDisposition(undefined, { type: "attachment", fallback: true });
+
+const res = contentDisposition.parse('attachment; filename="EURO rates.txt"');
+const type = res.type;
+const parameters = res.parameters;

content-disposition/index.d.ts

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+// Type definitions for content-disposition 0.5
+// Project: https://github.com/jshttp/content-disposition
+// Definitions by: Stefan Reichel <https://github.com/bomret>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare namespace contentDisposition {
+    export interface ContentDisposition {
+        type: string;
+        parameters: any;
+    }
+
+    export interface Options {
+        type?: string;
+        fallback?: string | boolean;
+    }
+
+    export function parse(contentDispositionHeader: string): ContentDisposition;
+}
+
+declare function contentDisposition(): string;
+declare function contentDisposition(filename: undefined, options: contentDisposition.Options): string;
+declare function contentDisposition(filename: string, options?: contentDisposition.Options): string;
+
+export = contentDisposition;

content-disposition/tsconfig.json

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+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "noImplicitAny": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "content-disposition-tests.ts"
+    ]
+}

content-disposition/tslint.json

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+{ "extends": "../tslint.json" }