diff --git a/.github/workflows/node.js.yml b/.github/workflows/ci.yml
similarity index 100%
rename from .github/workflows/node.js.yml
rename to .github/workflows/ci.yml
diff --git a/package.json b/package.json
index 3a1e658..80d12ab 100644
--- a/package.json
+++ b/package.json
@@ -59,7 +59,7 @@
   "scripts": {
     "compile": "tsc",
     "watch": "tsc -watch -p ./",
-    "pretest": "npm run compile",
+    "pretest": "TSC_COMPILE_ON_ERROR=true npm run compile || exit 0",
     "test": "NODE_OPTIONS=--enable-source-maps npx tape dist/test/test.js",
     "prelint": "npm run compile",
     "lint": "eslint src --ext ts",
diff --git a/src/generators/ansible.ts b/src/generators/ansible.ts
index 243fd43..05e4778 100644
--- a/src/generators/ansible.ts
+++ b/src/generators/ansible.ts
@@ -5,7 +5,10 @@ import { ansibleTemplate } from "../templates/ansible.js";
 import nunjucks from "nunjucks";
 import querystring from "query-string";
 
-function getDataString(request: Request): any {
+function getDataString(request: Request): string | object {
+  if (!request.data) {
+    return "";
+  }
   const parsedQueryString = querystring.parse(request.data, { sort: false });
   const keyCount = Object.keys(parsedQueryString).length;
   const singleKeyOnly =
diff --git a/src/generators/dart.ts b/src/generators/dart.ts
index 34b95b6..401b3cb 100644
--- a/src/generators/dart.ts
+++ b/src/generators/dart.ts
@@ -75,7 +75,7 @@ export const _toDart = (r: Request): string => {
   }
 
   const hasData = r.data;
-  if (hasData) {
+  if (r.data) {
     // escape single quotes if there're not already escaped
     if (r.data.indexOf("'") !== -1 && r.data.indexOf("\\'") === -1)
       r.data = jsesc(r.data);
diff --git a/src/generators/elixir.ts b/src/generators/elixir.ts
index 400b482..21354c8 100644
--- a/src/generators/elixir.ts
+++ b/src/generators/elixir.ts
@@ -96,7 +96,7 @@ function getBody(request: Request): string {
 }
 
 function getFormDataString(request: Request): string {
-  if (request.data && typeof request.data === "string") {
+  if (request.data) {
     return getDataString(request);
   }
 
@@ -137,6 +137,10 @@ ${content}
 }
 
 function getDataString(request: Request): string {
+  if (!request.data) {
+    return "";
+  }
+
   if (!request.isDataRaw && request.data.startsWith("@")) {
     const filePath = request.data.slice(1);
     if (request.isDataBinary) {
diff --git a/src/generators/javascript/javascript.ts b/src/generators/javascript/javascript.ts
index b233fdb..d982de9 100644
--- a/src/generators/javascript/javascript.ts
+++ b/src/generators/javascript/javascript.ts
@@ -38,7 +38,7 @@ export const _toJavaScript = (request: Request): string => {
     request.method.toUpperCase() !== "GET" ||
     request.headers ||
     request.auth ||
-    request.body
+    request.data
   ) {
     jsFetchCode += ", {\n";
 
diff --git a/src/generators/json.ts b/src/generators/json.ts
index 71c708a..ee33c91 100644
--- a/src/generators/json.ts
+++ b/src/generators/json.ts
@@ -20,7 +20,12 @@ type JSONOutput = {
   auth?: { user: string; password: string };
 };
 
-function getDataString(request: Request) {
+function getDataString(request: Request): {
+  data?: { [key: string]: string | string[] };
+} {
+  if (!request.data) {
+    return {};
+  }
   /*
     if ( !request.isDataRaw && request.data.startsWith('@') ) {
    var filePath = request.data.slice(1);
diff --git a/src/generators/matlab/common.ts b/src/generators/matlab/common.ts
index 55fa69b..777819d 100644
--- a/src/generators/matlab/common.ts
+++ b/src/generators/matlab/common.ts
@@ -115,7 +115,10 @@ const addCellArray = (
   return response;
 };
 
-const structify = (obj: any, indentLevel?: number) => {
+const structify = (
+  obj: number[] | string[] | { [key: string]: string } | string | number | null,
+  indentLevel?: number
+) => {
   let response = "";
   indentLevel = !indentLevel ? 1 : ++indentLevel;
   const indent = " ".repeat(4 * indentLevel);
diff --git a/src/generators/matlab/httpinterface.ts b/src/generators/matlab/httpinterface.ts
index 0a17e10..5f5ddb4 100644
--- a/src/generators/matlab/httpinterface.ts
+++ b/src/generators/matlab/httpinterface.ts
@@ -205,7 +205,7 @@ const prepareData = (request: Request) => {
     response = callFunction("body", "FormProvider", data);
   } else if (Object.prototype.hasOwnProperty.call(request, "data")) {
     response = prepareDataProvider(
-      request.data,
+      request.data as string,
       "body",
       ";",
       0,
@@ -221,7 +221,7 @@ const prepareData = (request: Request) => {
 
 const prepareRequestMessage = (request: Request): string => {
   let reqMessage: string[] | string = [repr(request.method.toLowerCase())];
-  if (request.cookie || request.headers) {
+  if (request.cookies || request.headers) {
     reqMessage.push("header");
   } else if (request.method.toLowerCase() === "get") {
     reqMessage = "";
diff --git a/src/generators/matlab/webservices.ts b/src/generators/matlab/webservices.ts
index a8e1fb8..e62c3e7 100644
--- a/src/generators/matlab/webservices.ts
+++ b/src/generators/matlab/webservices.ts
@@ -152,9 +152,13 @@ const prepareBasicData = (request: Request): string | string[] => {
   if (Object.prototype.hasOwnProperty.call(request, "data")) {
     if (request.data === "") {
       response = setVariableValue("body", repr());
-    } else if (request.data[0] === "@") {
+    } else if ((request.data as string)[0] === "@") {
       response.push(
-        callFunction("body", "fileread", repr(request.data.slice(1)))
+        callFunction(
+          "body",
+          "fileread",
+          repr((request.data as string).slice(1))
+        )
       );
 
       if (!request.isDataBinary) {
@@ -164,7 +168,7 @@ const prepareBasicData = (request: Request): string | string[] => {
       // if the data is in JSON, store it as struct in MATLAB
       // otherwise just keep it as a char vector
       try {
-        const jsonData = JSON.parse(request.data);
+        const jsonData = JSON.parse(request.data as string);
         if (typeof jsonData === "object") {
           let jsonText = structify(jsonData);
           if (!jsonText.startsWith("struct")) jsonText = repr(jsonText);
diff --git a/src/generators/php/php.ts b/src/generators/php/php.ts
index b5b037c..17860f5 100644
--- a/src/generators/php/php.ts
+++ b/src/generators/php/php.ts
@@ -81,11 +81,16 @@ export const _toPhp = (request: Request): string => {
         }
       }
       requestDataCode += "]";
-    } else if (request.isDataBinary && request.data.charAt(0) === "@") {
+    } else if (
+      request.isDataBinary &&
+      (request.data as string).charAt(0) === "@"
+    ) {
       requestDataCode =
-        "file_get_contents('" + quote(request.data.substring(1)) + "')";
+        "file_get_contents('" +
+        quote((request.data as string).substring(1)) +
+        "')";
     } else {
-      requestDataCode = "'" + quote(request.data) + "'";
+      requestDataCode = "'" + quote(request.data as string) + "'";
     }
     phpCode +=
       "curl_setopt($ch, CURLOPT_POSTFIELDS, " + requestDataCode + ");\n";
diff --git a/src/generators/python.ts b/src/generators/python.ts
index ac1bb48..ee27d99 100644
--- a/src/generators/python.ts
+++ b/src/generators/python.ts
@@ -20,7 +20,10 @@ function repr(value: string): string {
   return reprWithVariable(value, false);
 }
 
-function objToPython(obj: any, indent = 0): string {
+function objToPython(
+  obj: string | number | boolean | object | null,
+  indent = 0
+): string {
   let s = "";
   switch (typeof obj) {
     case "string":
@@ -87,7 +90,12 @@ function objToDictOrListOfTuples(obj: Query | QueryDict): string {
   return s;
 }
 
-function getDataString(request: Request) {
+function getDataString(
+  request: Request
+): [string | null, string | null, boolean | null] {
+  if (!request.data) {
+    return [null, null, null];
+  }
   if (!request.isDataRaw && request.data.startsWith("@")) {
     let filePath = request.data.slice(1);
     if (filePath === "-") {
@@ -505,7 +513,8 @@ export const _toPython = (request: Request): string => {
   if (request.insecure) {
     requestLineBody += ", verify=False";
   } else if (request.cacert || request.capath) {
-    requestLineBody += ", verify=" + repr(request.cacert || request.capath);
+    requestLineBody +=
+      ", verify=" + repr((request.cacert || request.capath) as string);
   }
 
   if (request.auth) {
diff --git a/src/generators/r.ts b/src/generators/r.ts
index 3e1c4aa..9949cd9 100644
--- a/src/generators/r.ts
+++ b/src/generators/r.ts
@@ -46,7 +46,10 @@ function getQueryDict(request: Request): string | undefined {
   return queryDict;
 }
 
-function getDataString(request: Request) {
+function getDataString(request: Request): string {
+  if (!request.data) {
+    return "";
+  }
   if (!request.isDataRaw && request.data.startsWith("@")) {
     const filePath = request.data.slice(1);
     return "data = upload_file('" + filePath + "')";
@@ -167,7 +170,7 @@ export const _toR = (request: Request) => {
 
   let dataString;
   let filesString;
-  if (request.data && typeof request.data === "string") {
+  if (request.data) {
     dataString = getDataString(request);
   } else if (request.multipartUploads) {
     filesString = getFilesString(request);
diff --git a/src/generators/strest.ts b/src/generators/strest.ts
index 145609b..9764361 100644
--- a/src/generators/strest.ts
+++ b/src/generators/strest.ts
@@ -5,7 +5,10 @@ import yaml from "yamljs";
 import jsesc from "jsesc";
 import querystring from "query-string";
 
-function getDataString(request: Request) {
+function getDataString(request: Request): PostData | null {
+  if (!request.data) {
+    return null;
+  }
   let mimeType = "application/json";
   if (request.data.indexOf("'") > -1) {
     request.data = jsesc(request.data);
@@ -36,8 +39,40 @@ function getDataString(request: Request) {
   };
 }
 
-export const _toStrest = (request: Request) => {
-  const response: { [key: string]: any } = { version: 2 };
+type PostData = {
+  mimeType: string;
+  text: object | string;
+};
+
+type BasicAuth = {
+  username?: string;
+  password: string;
+};
+
+type StrestOutput = {
+  version: number;
+  allowInsecure?: boolean;
+  requests?: {
+    curl_converter: {
+      request: {
+        url: string;
+        method: string;
+        postData?: PostData | null;
+        headers?: {
+          name: string;
+          value: string | null;
+        }[];
+        queryString?: { name: string; value: string }[];
+      };
+      auth?: {
+        basic: BasicAuth;
+      };
+    };
+  };
+};
+
+export const _toStrest = (request: Request): string => {
+  const response: StrestOutput = { version: 2 };
   if (request.insecure) {
     response.allowInsecure = true;
   }
@@ -52,7 +87,7 @@ export const _toStrest = (request: Request) => {
       },
     },
   };
-  if (request.data && typeof request.data === "string") {
+  if (request.data) {
     response.requests.curl_converter.request.postData = getDataString(request);
   }
 
@@ -67,12 +102,12 @@ export const _toStrest = (request: Request) => {
   }
   if (request.auth) {
     const [username, password] = request.auth;
-    const basic: { [key: string]: string } = {};
+    const basic: { username?: string; password?: string } = {};
     if (username) {
       basic.username = username;
     }
     basic.password = password;
-    response.requests.curl_converter.auth = { basic };
+    response.requests.curl_converter.auth = { basic: basic as BasicAuth };
   }
 
   let queryList;
@@ -85,7 +120,7 @@ export const _toStrest = (request: Request) => {
   const yamlString = yaml.stringify(response, 100, 2);
   return yamlString;
 };
-export const toStrest = (curlCommand: string | string[]) => {
+export const toStrest = (curlCommand: string | string[]): string => {
   const request = util.parseCurlCommand(curlCommand);
   return _toStrest(request);
 };
diff --git a/src/util.ts b/src/util.ts
index 73a9d79..dd25728 100644
--- a/src/util.ts
+++ b/src/util.ts
@@ -86,14 +86,33 @@ interface ParsedArguments {
 
 interface Request {
   url: string;
+  urlWithoutQuery: string;
   query?: Query;
   queryDict?: QueryDict;
+  method: string;
   headers?: Headers;
   stdin?: string;
   input?: string;
   multipartUploads?: [string, string][];
   auth?: [string, string];
-  [key: string]: any;
+  cookies?: Cookies;
+  compressed?: boolean;
+  isDataBinary?: boolean;
+  isDataRaw?: boolean;
+  digest?: boolean;
+  dataArray?: string[];
+  data?: string;
+  insecure?: boolean;
+  cert?: string | [string, string];
+  cacert?: string;
+  capath?: string;
+  proxy?: string;
+  proxyAuth?: string;
+  timeout?: string;
+  followRedirects?: boolean;
+  output?: string;
+  http2?: boolean;
+  http3?: boolean;
 }
 
 // BEGIN GENERATED CURL OPTIONS
@@ -1365,20 +1384,25 @@ function buildRequest(parsedArguments: ParsedArguments): Request {
     urlObject.query = urlObject.query.slice(0, -1);
   }
   const [queryAsList, queryAsDict] = parseQueryString(urlObject.query);
+  const useParsedQuery =
+    queryAsList &&
+    queryAsList.length &&
+    queryAsList.every((p) => p[1] !== null);
   // Most software libraries don't let you distinguish between a=&b= and a&b,
   // so if we get an `a&b`-type query string, don't bother.
-  const request: Request = { url };
-  if (!queryAsList || queryAsList.some((p) => p[1] === null)) {
-    request.urlWithoutQuery = url; // TODO: rename?
-  } else {
+  let urlWithoutQuery;
+  if (useParsedQuery) {
     urlObject.search = null; // Clean out the search/query portion.
-    request.urlWithoutQuery = URL.format(urlObject);
+    urlWithoutQuery = URL.format(urlObject);
+  } else {
+    urlWithoutQuery = url; // TODO: rename?
+  }
 
-    if (queryAsList.length > 0) {
-      request.query = queryAsList;
-      if (queryAsDict) {
-        request.queryDict = queryAsDict;
-      }
+  const request: Request = { url, method, urlWithoutQuery };
+  if (useParsedQuery) {
+    request.query = queryAsList;
+    if (queryAsDict) {
+      request.queryDict = queryAsDict;
     }
   }
 
@@ -1392,8 +1416,6 @@ function buildRequest(parsedArguments: ParsedArguments): Request {
     request.compressed = true;
   }
 
-  request.method = method;
-
   // TODO: all of these could be specified in the same command.
   // They also need to maintain order.
   // TODO: do all of these allow @file?