cancel
Showing results for 
Search instead for 
Did you mean: 
Reply
KevinMS
New Member

Custom connector action with x-www-form-urlencoded content-type

Hi all,

 

I'm trying to build a custom connector around Twilio's fax API, but I'm having trouble creating a custom action around a POST request with an application/x-www-form-urlencoded content type. The POST request is described in Twilio's documentation here.

 

 

I can get the request to work with curl and in Postman, but with the custom connector, I keep getting a "missing required parameter" error, which makes me think that the request body is still being sent as json rather than the "key=val&key=val" format that the endpoint expects. I tried to set the Content-Type header manually, but no luck. Here is the relevant part of my openapi file. I've tried a few variants of this. Do I have something wrong, or is Flow just unable to handle custom actions with this content type?

 

"post": {
        "responses": {
          "default": {
            "description": "default",
            "schema": {
              "type": "string"
            }
          }
        },
        "consumes": [
          "application/x-www-form-urlencoded"
        ],
        "produces":[
          "application/json"
        ],
        "summary": "Send a fax",
        "description": "Sends a fax",
        "operationId": "SEND_FAX",
        "parameters": [
          {
            "name": "Content-Type",
            "in": "header",
            "description": "Content-Type",
            "required": true,
            "type": "string",
            "default":"application/x-www-form-urlencoded"
          },
          {
            "in": "formData",
            "type": "string",
            "description": "From",
            "name": "From"
          },
          {
            "in": "formData",
            "type": "string",
            "description": "To",
            "name": "To"
          },
          {
            "in": "formData",
            "type": "string",
            "description": "MediaUrl",
            "name": "MediaUrl"
          }
        ]
      }

 

16 REPLIES 16
NathanHowe
New Member

Came across this post because I'm having the EXACT same problem. I'm trying to post to Twilio's fax API and have tried passing the parameters by URL encoding and as JSON, setting the content-type manually and not specifying it at all.  Every single time the Flow fails because the required 'To' parameter is missing.  Works fine in Postman but can't get it working in Flow.

 

Hoping you solved this.  Thanks!

thalesvalias
Frequent Visitor

Same problem here, but with a private app. x-www-form-urlencoded - formDate param seems to be completely ignored by Microsoft Flow 😞

Could solve that by changing the formData parameters to query paramenters.

Anonymous
Not applicable

@thalesvalias  I'm having the same problem. Your suggested solution only works for simple parameters

{
"title":"Test folder"
}

But if you have nested parameters, or an array, it throws a different error:

{
  "project":
      { 
      "ownerIds":["KUAE6EG7"],
      "status":"Red",
      "startDate":"2019-09-31",
      "endDate":"2019-10-07"
       }
}

This is the error I get:

Your custom connector has been successfully updated, but there was an issue converting it to WADL for PowerApps: An error occured while converting OpenAPI file to WADL file. Error: 'Parameter with type='array' is not currently supported at JSON path paths./api/v4/folders/{folderId}/folders.post.parameters[3]'

 

I'm still searching for a solution (In this thread: Custom Connector - error: array not supported in parameter )

Hey, at the end I haven't stick to my previous solution... I just let the params as they originally are, as formData, and it worked normally. The thing is that I was trying to use the Test mechanism from inside the connector, and the test for formData params seems messed up. So I just ignored the tests and used the custom connector on my flow and there it simply worked.

 

But in your case you're using PowerApps, I used MSFlow... so it might be different for you :(. Sorry, I wish I could helped you more.

 


@Anonymous wrote:

@thalesvalias  I'm having the same problem. Your suggested solution only works for simple parameters

{
"title":"Test folder"
}

But if you have nested parameters, or an array, it throws a different error:

{
  "project":
      { 
      "ownerIds":["KUAE6EG7"],
      "status":"Red",
      "startDate":"2019-09-31",
      "endDate":"2019-10-07"
       }
}

This is the error I get:

Your custom connector has been successfully updated, but there was an issue converting it to WADL for PowerApps: An error occured while converting OpenAPI file to WADL file. Error: 'Parameter with type='array' is not currently supported at JSON path paths./api/v4/folders/{folderId}/folders.post.parameters[3]'

 

I'm still searching for a solution (In this thread: Custom Connector - error: array not supported in parameter )


 

Anonymous
Not applicable

Thanks for sharing your workaround. 

Maybe I posted in the wrong forum, I actually am using Flow as well, because of the error message stopping me in the Custom Connector setup, I posted in the powerapps forum. 

 

I'm glad that it worked for you using formData, unfortunately the api I'm connecting to (Wrike) doesn't support that Content Type.

 

Since writing my post I tested in Postman and was successful in sending the request by adding the header Content-Type application/x-www-form-urlencoded - so I went back to the custom connector and added my parameters to the body, when I peek code everything shows up as I believe it should. 

 

And now I am in flow and stuck at the same place as the OP.

Other api, same problem:

In Postman: works fine

In connector test function: works fine too:

 

Swagger-Editor:

paths:
  /auth/token:
    post:
      consumes: [application/x-www-form-urlencoded]
      produces: [application/json]
      parameters:
      - {name: client_id, in: query, required: true, type: string, default: myclient,
        x-ms-visibility: internal}
      - {name: client_secret, in: query, required: true, type: string, default: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx,
        x-ms-visibility: internal}
      - {name: grant_type, in: query, required: true, type: string, default: client_credentials,
        x-ms-visibility: internal}
      - {name: Content-Type, in: header, required: true, type: string, default: application/x-www-form-urlencoded,
        x-ms-visibility: internal}

But using it in PowerApp or Flow, I get status=415 error (wrong Content-Type)

 

It seems, the the microsoft server is changeing the header:

{
  "method":"post",
  "queries":{
    "client_id":"myclient",
    "client_secret":"xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx",
    "grant_type":"client_credentials"
  },
  "headers":{
    "Content-Type":"application/x-www-form-urlencoded"
  },
  "path":"/auth/token",
  "host":{
    "api":{
      "runtimeUrl":"https://europe-002.azure-apim.net/apim/connector-999999999999999999999999999999999999"
    },
    "connection":{
      "name":"/providers/Microsoft.PowerApps/apis/shared_connector-999999999999999999999999999999999999/connections/xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
    }
  },
  "authentication":{
    "scheme":"Key",
    "parameter":"*sanitized*",
    "type":"Raw"
  }
}

back to 

 

"Content-Type":"application/json"

 

Anonymous
Not applicable

I was able to get mine working, I ended up putting the whole thing in the URL query.

For my problematic object I added it into the URL sample in PowerApps Custom Connector as:

 

&project=string

Then in Flow, I created a compose action and wrapped it in the following Expression:

string('{ "ownerIds":["KUAE6EG7"],"startDate":"2020-08-06"}')

image.png

 

It is working for now, so whatever re-formatting Flow is doing, forcing it into a string before-hand seems to do the trick for me.

Hi Gonzalo,

 

yes: for your problem this workaround helps changing the url

 

Unfortunately not for me, because

 

"content-type": "application/x-www-form-urlencoded"
is a HTTP Header parameter and not changeable (or addable) with a compose action 

 

rojoshi
Frequent Visitor

I got my API to finally work. Here is what I did:

1. Exported my postman collection

2. Converted the export JSON file into Swagger format

3. Then, in PowerApps Custom Connector, I opened my non-working connector in Edit mode

4. On Test tab, I opened the API in Swagger editor and pasted the Swagger code generated in step 2

5. I tried the API there itself and it returned a valid output

6. The problem here though is that the API only returns True or False values

7. So I had to edit the Swagger code a little bit so as to get a JSON response from the API. Used the link https://swagger.io/docs/specification/2-0/describing-responses/ for updating the Swagger

 

Hope this helps you.

Anonymous
Not applicable

@Frank37 ,

Have you tried adding the header as a "New Policy"? It might be worth a try.

 

  1. Click "New Policy"
  2. Name your policy
  3. Select "Set HTTP header"
  4. Select the Operations (Actions) that require this header
  5. Header name: "content-type"
  6. Header Value: "application/x-www-form-urlencoded"
  7. Action if header exists: "override"
  8. Run policy on: "Request"

 

@Anonymous  Great Idea: it works 👍

This helped me.

Please remember to encode using base64 method

Logic Apps works with and supports other content types, but might require that you manually get the message body by decoding the $content variable.

https://docs.microsoft.com/en-us/azure/logic-apps/logic-apps-content-type#other-content-types

How can I add a new policy

Anonymous
Not applicable

While editing your custom connector:

1. Under the Definition tab scroll all the way down

2. The last section is called Policies

3. click +New policy

@Anonymous this helped me but I can't get a successful response when running custom connector in Power App because the request body is always

 

"body": ""

 

instead of

 

"body": {}

 

or

 

"body": {
   "pagination": {
    "pageNumber": 1,
    "pageSize": 999
  }
}

 


How can I pass in a proper request body from Power Apps to custom connector?

Have talked about this problem extensively herehere, and here.

Helpful resources

Announcements

Copilot Cookbook Challenge | Week 3 Results | Win Tickets to the Power Platform Conference

We are excited to announce the "The Copilot Cookbook Community Challenge is a great way to showcase your creativity and connect with others. Plus, you could win tickets to the Power Platform Community Conference in Las Vegas in September 2024 as an amazing bonus.   Two ways to enter: 1. Copilot Studio Cookbook Gallery: https://aka.ms/CS_Copilot_Cookbook_Challenge 2. Power Apps Copilot Cookbook Gallery: https://aka.ms/PA_Copilot_Cookbook_Challenge   There will be 5 chances to qualify for the final drawing: Early Bird Entries: March 1 - June 2Week 1: June 3 - June 9Week 2: June 10 - June 16Week 3: June 17 - June 23Week 4: June 24 - June 30     At the end of each week, we will draw 5 random names from every user who has posted a qualifying Copilot Studio template, sample or demo in the Copilot Studio Cookbook or a qualifying Power Apps Copilot sample or demo in the Power Apps Copilot Cookbook. Users who are not drawn in a given week will be added to the pool for the next week. Users can qualify more than once, but no more than once per week. Four winners will be drawn at random from the total qualifying entrants. If a winner declines, we will draw again at random for the next winner.  A user will only be able to win once. If they are drawn multiple times, another user will be drawn at random. Prizes:  One Pass to the Power Platform Conference in Las Vegas, Sep. 18-20, 2024 ($1800 value, does not include travel, lodging, or any other expenses) Winners are also eligible to do a 10-minute presentation of their demo or solution in a community solutions showcase at the event. To qualify for the drawing, templates, samples or demos must be related to Copilot Studio or a Copilot feature of Power Apps, Power Automate, or Power Pages, and must demonstrate or solve a complete unique and useful business or technical problem. Power Automate and Power Pagers posts should be added to the Power Apps Cookbook. Final determination of qualifying entries is at the sole discretion of Microsoft. Weekly updates and the Final random winners will be posted in the News & Announcements section in the communities on July 29th, 2024. Did you submit entries early?  Early Bird Entries March 1 - June 2:  If you posted something in the "early bird" time frame complete this form: https://aka.ms/Copilot_Challenge_EarlyBirds if you would like to be entered in the challenge.   Week 1 Results:  Congratulations to the Week 1 qualifiers, you are being entered in the random drawing that will take place at the end of the challenge. Copilot Cookbook Gallery:Power Apps Cookbook Gallery:1.  @Mathieu_Paris 1.   @SpongYe 2.  n/a2.   @Deenuji 3.  n/a3.   @Nived_Nambiar  4.  n/a4.   @ManishSolanki 5.  n/a5.    n/a   Week 2 Results:  Congratulations to the Week 2 qualifiers, you are being entered in the random drawing that will take place at the end of the challenge. Copilot Cookbook Gallery:Power Apps Cookbook Gallery:1. Kasun_Pathirana1. ManishSolanki2. cloudatica2. madlad3. n/a3. SpongYe4. n/a4. n/a5. n/a5. n/a     Week 3 Results:  Congratulations to the Week 3 qualifiers, you are being entered in the random drawing that will take place at the end of the challenge. Copilot Cookbook Gallery:Power Apps Cookbook Gallery:1. Parul_Yadav_Neo1. n/a2. SpongYe2. n/a3. n/a3. n/a4. n/a4. n/a5. n/a5. n/a

Updates to Transitions in the Power Platform Communities

We're embarking on a journey to enhance your experience by transitioning to a new community platform. Our team has been diligently working to create a fresh community site, leveraging the very Dynamics 365 and Power Platform tools our community advocates for.  We started this journey with transitioning Copilot Studio forums and blogs in June. The move marks the beginning of a new chapter, and we're eager for you to be a part of it. The rest of the Power Platform product sites will be moving over this summer.   Stay tuned for more updates as we get closer to the launch. We can't wait to welcome you to our new community space, designed with you in mind. Let's connect, learn, and grow together.   Here's to new beginnings and endless possibilities!   If you have any questions, observations or concerns throughout this process please go to https://aka.ms/PPCommSupport.   To stay up to date on the latest details of this migration and other important Community updates subscribe to our News and Announcements forums: Copilot Studio, Power Apps, Power Automate, Power Pages

Your Moment to Shine: 2024 PPCC’s Got Power Awards Show

For the third year, we invite you, our talented community members, to participate in the grand 2024 Power Platform Community Conference's Got Power Awards. This event is your opportunity to showcase solutions that make a significant business impact, highlight extensive use of Power Platform products, demonstrate good governance, or tell an inspirational story. Share your success stories, inspire your peers, and show off some hidden talents.  This is your time to shine and bring your creations into the spotlight!  Make your mark, inspire others and leave a lasting impression. Sign up today for a chance to showcase your solution and win the coveted 2024 PPCC’s Got Power Award. This year we have three categories for you to participate in: Technical Solution Demo, Storytelling, and Hidden Talent.      The Technical solution demo category showcases your applications, automated workflows, copilot agentic experiences, web pages, AI capabilities, dashboards, and/or more. We want to see your most impactful Power Platform solutions!  The Storytelling category is where you can share your inspiring story, and the Hidden Talent category is where your talents (such as singing, dancing, jump roping, etc.) can shine! Submission Details:  Fill out the submission form https://aka.ms/PPCCGotPowerSignup by the end of July with details and a 2–5-minute video showcasing your Solution impact. (Please let us know you're coming to PPCC, too!)After review by a panel of Microsoft judges, the top storytellers will be invited to present a virtual demo presentation to the judges during early August. You’ll be notified soon after if you have been selected as a finalist to share your story live at PPCC’s Got Power!  The live show will feature the solution demos and storytelling talents of the top contestants, winner announcements, and the opportunity to network with your community.  It's not just a showcase for technical talent and storytelling showmanship, show it's a golden opportunity to make connections and celebrate our Community together! Let's make this a memorable event! See you there!   Mark your calendars! Date and Time: Thursday, Sept 19th Location: PPCC24 at the MGM Grand, Las Vegas, NV 

Update! June 13th, Community Ambassador Call for User Group Leaders and Super Users

Calling all Super Users & User Group Leaders   UPDATE:  We just wrapped up June's Community Ambassador monthly calls for Super Users and User Group Leaders. We had a fantastic call with lots of engagement. We are excited to share some highlights with you!    Big THANK YOU to our special guest Thomas Verhasselt, from the Copilot Studio Product Team for sharing how to use Power Platform Templates to achieve next generation growth.     A few key takeaways: Copilot Studio Cookbook Challenge:  Week 1 results are posted, Keep up the great work!Summer of Solutions:  Starting on Monday, June 17th. Just by providing solutions in the community, you can be entered to win tickets to Power Platform Community Conference.Super User Season 2: Coming SoonAll communities moving to the new platform end of July We also honored two different community members during the call, Mohamed Amine Mahmoudi and Markus Franz! We are thankful for both leaders' contributions and engagement with their respective communities. 🎉   Be sure to mark your calendars and register for the meeting on July 11th and stay up to date on all of the changes that are coming. Check out the Super User Forum boards for details.   We're excited to connect with you and continue building a stronger community together.   See you at the call!

Win free tickets to the Power Platform Conference | Summer of Solutions

We are excited to announce the Summer of Solutions Challenge!    This challenge is kicking off on Monday, June 17th and will run for (4) weeks.  The challenge is open to all Power Platform (Power Apps, Power Automate, Copilot Studio & Power Pages) community members. We invite you to participate in a quest to provide solutions to as many questions as you can. Answers can be provided in all the communities.    Entry Period: This Challenge will consist of four weekly Entry Periods as follows (each an “Entry Period”)   - 12:00 a.m. PT on June 17, 2024 – 11:59 p.m. PT on June 23, 2024 - 12:00 a.m. PT on June 24, 2024 – 11:59 p.m. PT on June 30, 2024 - 12:00 a.m. PT on July 1, 2024 – 11:59 p.m. PT on July 7, 2024 - 12:00 a.m. PT on July 8, 2024 – 11:59 p.m. PT on July 14, 2024   Entries will be eligible for the Entry Period in which they are received and will not carryover to subsequent weekly entry periods.  You must enter into each weekly Entry Period separately.   How to Enter: We invite you to participate in a quest to provide "Accepted Solutions" to as many questions as you can. Answers can be provided in all the communities. Users must provide a solution which can be an “Accepted Solution” in the Forums in all of the communities and there are no limits to the number of “Accepted Solutions” that a member can provide for entries in this challenge, but each entry must be substantially unique and different.    Winner Selection and Prizes: At the end of each week, we will list the top ten (10) Community users which will consist of: 5 Community Members & 5 Super Users and they will advance to the final drawing. We will post each week in the News & Announcements the top 10 Solution providers.  At the end of the challenge, we will add all of the top 10 weekly names and enter them into a random drawing.  Then we will randomly select ten (10) winners (5 Community Members & 5 Super Users) from among all eligible entrants received across all weekly Entry Periods to receive the prize listed below. If a winner declines, we will draw again at random for the next winner.  A user will only be able to win once overall. If they are drawn multiple times, another user will be drawn at random.  Individuals will be contacted before the announcement with the opportunity to claim or deny the prize.  Once all of the winners have been notified, we will post in the News & Announcements of each community with the list of winners.   Each winner will receive one (1) Pass to the Power Platform Conference in Las Vegas, Sep. 18-20, 2024 ($1800 value). NOTE: Prize is for conference attendance only and any other costs such as airfare, lodging, transportation, and food are the sole responsibility of the winner. Tickets are not transferable to any other party or to next year’s event.   ** PLEASE SEE THE ATTACHED RULES for this CHALLENGE**

Celebrating the June Super User of the Month: Markus Franz

Markus Franz is a phenomenal contributor to the Power Apps Community. Super Users like Markus inspire others through their example, encouragement, and active participation.    The Why: "I do this to help others achieve what they are trying to do. As a total beginner back then without IT background I know how overwhelming things can be, so I decided to jump in and help others. I also do this to keep progressing and learning myself." Thank you, Markus Franz, for your outstanding work! Keep inspiring others and making a difference in the community! 🎉  Keep up the fantastic work! 👏👏 Markus Franz | LinkedIn  Power Apps: mmbr1606  

Users online (6,757)