Post Request with SSL doesn’t work (mbedtls error)

[NeroNekro]

Godot version

3.4.3

System information

MacOS 12

Issue description

My App make some request to my server. The GET requests works fine and one POST request works too, but my last post request to upload a image in base64 doesn't work.

This error shows up in Xcode:
thirdparty/mbedtls/library/ssl_tls.c:3746: mbedtls_ssl_flush_output() returned -26752 (-0x6880)

I read a problem with lets encrypt and add the certificate from github/godot/thirdparty/certs to my project settings, but it doesn't help.

var query = http_client.query_string_from_dict( {"file": base_64, "format": img.get_format(), "privacy": accepted_privacy, "terms": accepted_term})
var headers = ["Content-Type: application/x-www-form-urlencoded", "Authorization: Bearer "+ connector.token]
print("Try HTTP Request")
$POSTRequest.connect("request_completed", self, "get_upload_status")
var result = $POSTRequest.request(connector.server_url + "upload", headers, connector.ssl, HTTPClient.METHOD_POST, query)
if result != 0:
    print("HTTP Error: " + str(result))

connector.ssl = True
connector.server_url = https://myserver.tld/somepath

On my Testsystem without SSL it works very well.

Steps to reproduce

Make Post Request with a Base64 File

Minimal reproduction project

No response

[Calinou]

@NeroNekro Please upload a minimal reproduction project to make this easier to troubleshoot.

thirdparty/mbedtls/library/ssl_tls.c:3746: mbedtls_ssl_flush_output() returned -26752 (-0x6880)

This refers to the MBEDTLS_ERR_SSL_WANT_WRITE error code:

godot/thirdparty/mbedtls/include/mbedtls/ssl.h

Lines 168 to 169 in 178961a

	/** Connection requires a write call. */
	#define MBEDTLS_ERR_SSL_WANT_WRITE -0x6880

[NeroNekro]

@NeroNekro Please upload a minimal reproduction project to make this easier to troubleshoot.

thirdparty/mbedtls/library/ssl_tls.c:3746: mbedtls_ssl_flush_output() returned -26752 (-0x6880)

This refers to the MBEDTLS_ERR_SSL_WANT_WRITE error code:

godot/thirdparty/mbedtls/include/mbedtls/ssl.h

Lines 168 to 169 in 178961a

	/** Connection requires a write call. */
	#define MBEDTLS_ERR_SSL_WANT_WRITE -0x6880

I uploaded a test project on google drive.

https://drive.google.com/file/d/1jftSIF-UyOX55_SNZOpL4-Cagkcc3uAW/view?usp=sharing

I had configured a testserver or you change the link in connector.gd.

Server side code:

secure_token = "266d0c79shtsvjsfg7706f25db22d88effa139c01b7f19eea2edf3c6919ee2cf995976d17%="

def check_token(header):
    token = header.split()[1]
    if token == secure_token:
        return True
    else:
        return False

@cat_v1.route("/upload", methods=["POST"])
def upload_cat_image():
    if check_token(request.headers.get('Authorization')):
        image = request.form.get('file')
        filetype = request.form.get('format')
        terms = request.form.get('terms')
        privacy = request.form.get('privacy')
        filename = str(uuid.uuid4())
        with open("api/cat/uploaded_images/" + filename + ".png", "wb") as fh:
            fh.write(base64.b64decode(image))
        ImagesTMP.insert(filename=filename,
                         filenameBackup="",
                         extension=filetype).execute()
        return "{'status': 'yes'}"
    return "{'status': 'no'}"

[Calinou]

@NeroNekro Please surround large blocks of text with triple backticks like this:

```
text here
```

This prevents them from taking too much space and also makes sure issue references aren't accidentally created. I edited your comment, but remember to do this next time 🙂

[NeroNekro]

@NeroNekro Please surround large blocks of text with triple backticks like this:

text here

This prevents them from taking too much space and also makes sure issue references aren't accidentally created. I edited your comment, but remember to do this next time 🙂

yes, of course. sorry for the circumstances.

A few more information:
The server side code is written with python-flask
I renewed all my certificates, but the same error.
On my browser I get the information that the certificate is valid and secure.

[NeroNekro]

This error message comes up, if the server not responding or something else. Server side fix was the solution. thanks for your help