JSON to XLSX with airDev downloader: file format or file extension is not valid

sxtn.digital · 2024-07-24T10:17:07.476Z

JSON to XLSX by @rico.trevisan and Fil downloader from @AirDev

I have successfully installed the plugin Excel / XLSX Creator and can generate .xlsx files. It works perfectly.

However, when using the @AirDev downloader to open the file, I get the following error:

“Cannot open the file because the file format or file extension is not valid.”

The strange thing is, if I download it from the backend using “bubble.fileManager,” it works fine. Also, if I open the corrupted file in Google Sheets, it works without any issues.

I’ve been working on this for over 18 hours straight and can’t figure it out. I’m running out of time to publish my new update, and I rely on this function to generate payroll data that my users send to the accounting office.

I would greatly appreciate any pointers on how to solve this.

API_xlsx_creator

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Workflow: run_xlsx_creator

Search for things…

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Generate a JSON array with the :format as text

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**INPUT JSON & RESULT base64**

{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “1”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “105”,
“Sats”: “220”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “16”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “4.75”,
“Sats”: “115”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “7”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “87.25”,
“Sats”: “191”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “20”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “47.75”,
“Sats”: “191”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “21”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “14.75”,
“Sats”: “110”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “2”,
“Art”: “1”,
“Kommentar”: “”,
“Antall”: “1”,
“Sats”: “50000”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “2”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “115.75”,
“Sats”: “215”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “3”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “151”,
“Sats”: “215”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “6”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “90.25”,
“Sats”: “191”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “8”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “47.5”,
“Sats”: “191”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “22”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “13”,
“Sats”: “150”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “12”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “17.25”,
“Sats”: “155”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “14”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “10”,
“Sats”: “115”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “10”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “7.25”,
“Sats”: “191”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “24”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “24.75”,
“Sats”: “191”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “19”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “9”,
“Sats”: “115”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “13”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “9”,
“Sats”: “208”,
“Projekt”: “”
},{
“År”: “2024”,
“Måned”: “06”,
“Ansattnummer”: “4”,
“Art”: “2”,
“Kommentar”: “”,
“Antall”: “2”,
“Sats”: “208”,
“Projekt”: “”

BASE64

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[truncated, was 27908]
}

image846×197 6.98 KB

Front end: airDev downloader

image722×272 4.97 KB

URL to file:
https://2c7b72955cb81ec1a99b821510a561cb.cdn.bubble.io/f1721808625179x843928011772459500/Payroll.xlsx?_gl=1*891pf*_gcl_au*ODIwNDE1NjI0LjE3MTkyMTI1MjY.*_ga*NzE3NDIxNTI1LjE2OTU3MTI5MDY.*_ga_BFPVR2DEE2*MTcyMTgxMTQzMC4yMTAuMS4xNzIxODEyOTI1LjYwLjAuMA…

sxtn.digital · 2024-07-24T11:56:38.722Z

So my frien GPT is letting me know that,

The issue you are encountering, where the downloaded XLSX file is reported as invalid, is due to the fact that the content of the file is not actually a valid XLSX file but an HTML document. This can happen if the file generation or download process goes wrong and instead of receiving a binary XLSX file, you receive an HTML page.

Any thoughts?

The HTML respon

sxtn.digital · 2024-07-24T17:42:22.751Z

Slow respone today, could be the vacation times

But im thankful for beeing pushed to find the sulotion myself. Always the best way to learn

So just for closing this post, this was break true.

18h in I find the most simple solutions…
Why no just ask GPT and let the machines take care of my hustle…To just share some “in my point of veiw” totaly revolutionast exåerience.

I have created a document with all restriktions and limitations regarding the toolbox plugin (Bubble to JS, Server script) in the bubble.io environment and saved it as a doc.
I start with pasting the doc to GPT (i prefer to user the market place "java script prodigy) ChatGPT - Java Script Prodigy
Then i just stated my issue.

Boom, 20 min of consulting and .xllsx file was downloading like a super start…

// Function to convert a base64 string to a Blob
function base64ToBlob(base64, mime) {
const sliceSize = 512;
const byteChars = atob(base64);
const byteArrays = ;
for (let offset = 0; offset < byteChars.length; offset += sliceSize) {
const slice = byteChars.slice(offset, offset + sliceSize);
const byteNumbers = new Array(slice.length);
for (let i = 0; i < slice.length; i++) {
byteNumbers[i] = slice.charCodeAt(i);
}
const byteArray = new Uint8Array(byteNumbers);
byteArrays.push(byteArray);
}
return new Blob(byteArrays, { type: mime });
}
// Function to trigger the download
function triggerDownload(base64Data, fileName) {
const mimeType = ‘application/vnd.openxmlformats-officedocument.spreadsheetml.sheet’;
const blob = base64ToBlob(base64Data, mimeType);
const link = document.createElement(‘a’);
link.href = window.URL.createObjectURL(blob);
link.download = fileName;
document.body.appendChild(link);
link.click();
document.body.removeChild(link);
}
// Call this function with parameters passed from Bubble
triggerDownload(properties.param1, properties.param2);

JS code, just past in direkt in to Bubble to JS event in workflow

Discription:

Steps to Ensure a Complete Base64 String

Obtain the Complete Base64 String: Ensure you have the entire base64-encoded content. The string should not include any text like “[truncated, was 23948]”.
Decode the Base64 String: Use JavaScript to decode the base64 string and check its validity.

Bubble Setup

Parameter 1 (Base64 String):

Ensure param1 is set to the complete base64-encoded string of your XLSX file.

Parameter 2 (File Name):

Set param2 to the desired name of the file, e.g., "downloaded-file.xlsx".

Example Bubble Workflow

Trigger the Download:

Create a button in your Bubble app to start the download process.
Add a workflow action to this button to run the JavaScript.

Configure the Run Javascript Action:

Paste the JavaScript code provided above into the script editor of the Run Javascript action.
Set param1 to the complete base64-encoded string of the XLSX file.
Set param2 to the desired file name, e.g., "downloaded-file.xlsx".

By following these steps and ensuring the base64 string is complete and accurate, you should be able to correctly fetch and download the XLSX file without it being corrupted or mistaken for an HTML document.

rico.trevisan · 2024-07-29T10:50:59.966Z

Holidays indeed.

Great that you found a solution. Learning JS is never a negative. I like your hussle.

Looks like you did a ton of work, normally the plugin should take care of that. My hunch — while I’m still in full holiday mode — is to start troubleshooting by not making the file name static for the download and then on the file creation.

Another “life hack” that I like to use is to never work on a problem for more than 2 hours uninterrupted. I make myself walk away. I realize I get blind, go deeper and deeper into the problem without taking enough perspective.

sxtn.digital · 2024-08-06T04:51:00.872Z

@rico.trevisan

hey man and thanks for the advice, and my problem is back Just pushed out the new version of payroll, salary run for my clients today… I have tried all combinations of filename, Surely something i missed…

But was working on the layout, moved the JS and added some additionl events to the wokrflow, and bam,
I have it wokring on an other branch, but no mather what, i can get it up and running on main.

Only thing i have noticed is; when the file is download as it should, It says “downloaded form bubble” in the downloading card in the browser, when it is not working, it just says the file name.

Would appreciate some pointers