fix(*): support multipart form data post

src/SASViyaApiClient.ts

@@ -20,6 +20,7 @@ import { Logger, LogLevel } from '@sasjs/utils/logger'
 import { isAuthorizeFormRequired } from './auth/isAuthorizeFormRequired'
 import { RequestClient } from './request/RequestClient'
 import { NotFoundError } from './types/NotFoundError'
+import { SasAuthResponse } from '@sasjs/utils/types'
 
 /**
  * A client for interfacing with the SAS Viya REST API.
@@ -693,7 +694,13 @@ export class SASViyaApiClient {
     }
 
     const authResponse = await this.requestClient
-      .post(url, formData, undefined, 'application/json', headers)
+      .post<SasAuthResponse>(
+        url,
+        formData,
+        undefined,
+        'multipart/form-data; boundary=' + (formData as any)._boundary,
+        headers
+      )
       .then((res) => res.result)
 
     return authResponse
@@ -733,7 +740,13 @@ export class SASViyaApiClient {
     }
 
     const authResponse = await this.requestClient
-      .post(url, formData, undefined, 'application/json', headers)
+      .post<SasAuthResponse>(
+        url,
+        formData,
+        undefined,
+        'multipart/form-data; boundary=' + (formData as any)._boundary,
+        headers
+      )
       .then((res) => res.result)
 
     return authResponse

src/request/RequestClient.ts

@@ -270,14 +270,16 @@ export class RequestClient implements HttpClient {
     accessToken: string | undefined,
     contentType: string
   ) => {
-    const headers: any = {
-      'Content-Type': contentType
+    const headers: any = {}
+
+    if (contentType !== 'application/x-www-form-urlencoded') {
+      headers['Content-Type'] = contentType
     }
 
-    if (contentType === 'text/plain') {
-      headers.Accept = '*/*'
-    } else {
+    if (contentType === 'application/json') {
       headers.Accept = 'application/json'
+    } else {
+      headers.Accept = '*/*'
     }
     if (accessToken) {
       headers.Authorization = `Bearer ${accessToken}`