QBConnector Class

Properties   Methods   Events   Config Settings   Errors  

The QBCONNECTOR class is a utility that allows you to connect your QuickBooks Integrator applications to remote QuickBooks instances.

Syntax

class inqb.QBConnector

Remarks

The QBConnector class is a lightweight web server which listens for HTTP requests originating from the QuickBooks Integrator classs. Each request sent to the QBConnector by a QuickBooks Integrator class contains the XML data to be communicated to QuickBooks as well as configuration settings specifying how the connection is to be opened. The QBConnector then communicates with QuickBooks via COM, and returns the QuickBooks response (or an error message) in the HTTP reply.

Using the QBConnector class is easy. Simply set listening to True, and the class will begin listening for incoming messages on the specified local_port. The messages will be processed by the QuickBooks application that is running on the same machine as the QBConnector, and the results will automatically be returned to the requesting client.

Basic authentication is enabled by default, meaning the connecting clients must present a user name and password in the QBConnectionString of the class they're using. The supplied user name and password are checked against the list of authorized_users. If no user in the list matches the supplied credentials, the on_authorization event will fire with the Accept parameter set to false. If the user was found in the list of authorized_users then the parameter will be set to True. You may override this functionality by setting the Accept parameter inside the on_authorization event manually. If no "Authorization" header supplied in the request, the on_authorization event will fire with blank User and Password parameters.

Note that the authorized_user_qb_connection_string will be used to make the connection to QuickBooks for a user found in the authorized_users collection.

Any of the QuickBooks Integrator classs can connect to the QBConnector using the QBConnectionString property of any of the classs. For instance, an example using the Invoice class follows: Invoice.QBConnectionString = "URL='http://www.foo.com:2080'" User='Foo' Password='Bar'";

Using SSL along with a digital certificate greatly increases the security of the Remote Connector. SSL will encrypt all data transmitted across the network, ensuring that only the Connector can read incoming requests, and that only the requesting client can read the QuickBooks responses. This prevents unauthorized parties from accessing your QuickBooks data. You should use a full digital certificate on the server (Connector) side, and this will contain a public key and a private key. This version of your certificate should be kept private. You may export a version of the certificate containing the public key only, and distribute this to all clients that need to communicate with the Connector.

To use this functionality, set the ssl_cert with a valid certificate and then change the ssl_start_mode to sslImplicit. Now all clients must post to the QBConnector using HTTPS. eg: Invoice.QBConnectionString = "URL='https://www.foo.com:2080' User='Foo' Password='Bar'"; // https instead of http

The client (in these examples Invoice) has an SSLServerAuthentication event that will fire when the server presents its certificate. If the public key presented by the QBConnector is trusted by the system, the Accept parameter will be True. If it is not trusted by the system (Accept is False), you should inspect the certificate and if valid, override by setting Accept to True.

Property List

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The following is the full list of the properties of the class with short descriptions. Click on the links for further details.

Method List

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The following is the full list of the methods of the class with short descriptions. Click on the links for further details.

Event List

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The following is the full list of the events fired by the class with short descriptions. Click on the links for further details.

Config Settings

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The following is a list of config settings for the class with short descriptions. Click on the links for further details.

authorized_user_count Property

The number of records in the Authorized arrays.

Syntax

def get_authorized_user_count() -> int: ...
def set_authorized_user_count(value: int) -> None: ...

authorized_user_count = property(get_authorized_user_count, set_authorized_user_count)

Default Value

0

Remarks

This property controls the size of the following arrays:

• authorized_auth_mode
• authorized_user
• authorized_user_password
• authorized_user_qb_connection_string

The array indices start at 0 and end at authorized_user_count - 1.

authorized_auth_mode Property

This property defines how the user is authorized.

Syntax

def get_authorized_auth_mode(authorized_user_index: int) -> int: ...
def set_authorized_auth_mode(authorized_user_index: int, value: int) -> None: ...

Default Value

0

Remarks

This property defines how the user is authorized.

There are two ways that the user may be authorized, against the user list defined in the class, or as a Windows user. From the client side the process of connecting is exactly the same no matter which option you choose. Possible values are:

When using the amNormal AuthMode (default) the user's password will be checked against the Password property.

When using the amWindows AuthMode the class will validate the user's credentials with Windows. When calling add_user the Password parameter should be set to empty string.

The authorized_user_index parameter specifies the index of the item in the array. The size of the array is controlled by the authorized_user_count property.

authorized_user_password Property

A password associated with the User who is allowed to connect to the class.

Syntax

def get_authorized_user_password(authorized_user_index: int) -> str: ...
def set_authorized_user_password(authorized_user_index: int, value: str) -> None: ...

Default Value

""

Remarks

A password associated with the authorized_user who is allowed to connect to the class. Connecting clients' authorization headers will be compared against this authorized_user and authorized_password.

The authorized_user_index parameter specifies the index of the item in the array. The size of the array is controlled by the authorized_user_count property.

authorized_user_qb_connection_string Property

An aggregate consisting of various QuickBooks connection properties that are used to connect the authorized client to the QuickBooks application.

Syntax

def get_authorized_user_qb_connection_string(authorized_user_index: int) -> str: ...
def set_authorized_user_qb_connection_string(authorized_user_index: int, value: str) -> None: ...

Default Value

""

Remarks

An aggregate consisting of various QuickBooks connection properties that are used to connect the authorized client to the QuickBooks application.

The connection properties should be formatted in a sequence as follows:

propertyname = "propertyvalue" propertyname = "propertyvalue" ...

The order is irrelevant, and the whitespace around the equal sign is optional.

The following properties are currently supported:

The authorized_user_index parameter specifies the index of the item in the array. The size of the array is controlled by the authorized_user_count property.

authorized_user Property

Name of a user which is allowed to connect to the class.

Syntax

def get_authorized_user(authorized_user_index: int) -> str: ...
def set_authorized_user(authorized_user_index: int, value: str) -> None: ...

Default Value

""

Remarks

Name of a user which is allowed to connect to the class. Connecting clients' authorization headers will be compared against this authorized_user and authorized_password.

The authorized_user_index parameter specifies the index of the item in the array. The size of the array is controlled by the authorized_user_count property.

connected_to_qb Property

Opens or closes a persistent connection to QuickBooks.

Syntax

def get_connected_to_qb() -> bool: ...

connected_to_qb = property(get_connected_to_qb, None)

Default Value

FALSE

Remarks

You may use this property to determine whether the class is currently connected to QuickBooks.

This property is read-only.

enable_ssl Property

Indicates whether server starts in SSL-mode.

Syntax

def get_enable_ssl() -> bool: ...
def set_enable_ssl(value: bool) -> None: ...

enable_ssl = property(get_enable_ssl, set_enable_ssl)

Default Value

FALSE

Remarks

This property must be set before setting listening to True. When enable_ssl is True, plaintext connections to the class will be rejected.

listening Property

This property indicates whether the class is listening for incoming connections on LocalPort.

Syntax

def get_listening() -> bool: ...

listening = property(get_listening, None)

Default Value

FALSE

Remarks

This property indicates whether the class is listening for connections on the port specified by the local_port property. Use the start_listening and stop_listening methods to control whether the class is listening.

This property is read-only.

local_host Property

The name of the local host or user-assigned IP interface through which connections are initiated or accepted.

Syntax

def get_local_host() -> str: ...
def set_local_host(value: str) -> None: ...

local_host = property(get_local_host, set_local_host)

Default Value

""

Remarks

This property contains the name of the local host as obtained by the gethostname() system call, or if the user has assigned an IP address, the value of that address.

In multihomed hosts (machines with more than one IP interface) setting LocalHost to the IP address of an interface will make the class initiate connections (or accept in the case of server classs) only through that interface. It is recommended to provide an IP address rather than a hostname when setting this property to ensure the desired interface is used.

If the class is connected, the local_host property shows the IP address of the interface through which the connection is made in internet dotted format (aaa.bbb.ccc.ddd). In most cases, this is the address of the local host, except for multihomed hosts (machines with more than one IP interface).

Note: local_host is not persistent. You must always set it in code, and never in the property window.

local_port Property

The TCP port in the local host where the class listens.

Syntax

def get_local_port() -> int: ...
def set_local_port(value: int) -> None: ...

local_port = property(get_local_port, set_local_port)

Default Value

2080

Remarks

The local_port property must be set before QBConnector starts listening. If its value is 0, then the TCP/IP subsystem picks a port number at random. The port number can be found by checking the value of the local_port property after listening is set to True.

The service port is not shared among servers (i.e. there can be only one QBConnector 'listening' on a particular port at one time).

The default value for local_port is 2080.

ssl_authenticate_clients Property

If set to True, the server asks the client(s) for a certificate.

Syntax

def get_ssl_authenticate_clients() -> bool: ...
def set_ssl_authenticate_clients(value: bool) -> None: ...

ssl_authenticate_clients = property(get_ssl_authenticate_clients, set_ssl_authenticate_clients)

Default Value

FALSE

Remarks

This property is used in conjunction with the on_ssl_client_authentication event. Please refer to the documentation of the on_ssl_client_authentication event for details.

ssl_cert_effective_date Property

The date on which this certificate becomes valid.

Syntax

def get_ssl_cert_effective_date() -> str: ...

ssl_cert_effective_date = property(get_ssl_cert_effective_date, None)

Default Value

""

Remarks

The date on which this certificate becomes valid. Before this date, it is not valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2000 15:00:00.

This property is read-only.

ssl_cert_expiration_date Property

The date on which the certificate expires.

Syntax

def get_ssl_cert_expiration_date() -> str: ...

ssl_cert_expiration_date = property(get_ssl_cert_expiration_date, None)

Default Value

""

Remarks

The date on which the certificate expires. After this date, the certificate will no longer be valid. The date is localized to the system's time zone. The following example illustrates the format of an encoded date:

23-Jan-2001 15:00:00.

This property is read-only.

ssl_cert_extended_key_usage Property

A comma-delimited list of extended key usage identifiers.

Syntax

def get_ssl_cert_extended_key_usage() -> str: ...

ssl_cert_extended_key_usage = property(get_ssl_cert_extended_key_usage, None)

Default Value

""

Remarks

A comma-delimited list of extended key usage identifiers. These are the same as ASN.1 object identifiers (OIDs).

This property is read-only.

ssl_cert_fingerprint Property

The hex-encoded, 16-byte MD5 fingerprint of the certificate.

Syntax

def get_ssl_cert_fingerprint() -> str: ...

ssl_cert_fingerprint = property(get_ssl_cert_fingerprint, None)

Default Value

""

Remarks

The hex-encoded, 16-byte MD5 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: bc:2a:72:af:fe:58:17:43:7a:5f:ba:5a:7c:90:f7:02

This property is read-only.

ssl_cert_fingerprint_sha1 Property

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate.

Syntax

def get_ssl_cert_fingerprint_sha1() -> str: ...

ssl_cert_fingerprint_sha1 = property(get_ssl_cert_fingerprint_sha1, None)

Default Value

""

Remarks

The hex-encoded, 20-byte SHA-1 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 30:7b:fa:38:65:83:ff:da:b4:4e:07:3f:17:b8:a4:ed:80:be:ff:84

This property is read-only.

ssl_cert_fingerprint_sha256 Property

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate.

Syntax

def get_ssl_cert_fingerprint_sha256() -> str: ...

ssl_cert_fingerprint_sha256 = property(get_ssl_cert_fingerprint_sha256, None)

Default Value

""

Remarks

The hex-encoded, 32-byte SHA-256 fingerprint of the certificate. This property is primarily used for keys which do not have a corresponding X.509 public certificate, such as PEM keys that only contain a private key. It is commonly used for SSH keys.

The following example illustrates the format: 6a:80:5c:33:a9:43:ea:b0:96:12:8a:64:96:30:ef:4a:8a:96:86:ce:f4:c7:be:10:24:8e:2b:60:9e:f3:59:53

This property is read-only.

ssl_cert_issuer Property

The issuer of the certificate.

Syntax

def get_ssl_cert_issuer() -> str: ...

ssl_cert_issuer = property(get_ssl_cert_issuer, None)

Default Value

""

Remarks

The issuer of the certificate. This property contains a string representation of the name of the issuing authority for the certificate.

This property is read-only.

ssl_cert_private_key Property

The private key of the certificate (if available).

Syntax

def get_ssl_cert_private_key() -> str: ...

ssl_cert_private_key = property(get_ssl_cert_private_key, None)

Default Value

""

Remarks

The private key of the certificate (if available). The key is provided as PEM/Base64-encoded data.

Note: The ssl_cert_private_key may be available but not exportable. In this case, ssl_cert_private_key returns an empty string.

This property is read-only.

ssl_cert_private_key_available Property

Whether a PrivateKey is available for the selected certificate.

Syntax

def get_ssl_cert_private_key_available() -> bool: ...

ssl_cert_private_key_available = property(get_ssl_cert_private_key_available, None)

Default Value

FALSE

Remarks

Whether a ssl_cert_private_key is available for the selected certificate. If ssl_cert_private_key_available is True, the certificate may be used for authentication purposes (e.g., server authentication).

This property is read-only.

ssl_cert_private_key_container Property

The name of the PrivateKey container for the certificate (if available).

Syntax

def get_ssl_cert_private_key_container() -> str: ...

ssl_cert_private_key_container = property(get_ssl_cert_private_key_container, None)

Default Value

""

Remarks

The name of the ssl_cert_private_key container for the certificate (if available). This functionality is available only on Windows platforms.

This property is read-only.

ssl_cert_public_key Property

The public key of the certificate.

Syntax

def get_ssl_cert_public_key() -> str: ...

ssl_cert_public_key = property(get_ssl_cert_public_key, None)

Default Value

""

Remarks

The public key of the certificate. The key is provided as PEM/Base64-encoded data.

This property is read-only.

ssl_cert_public_key_algorithm Property

The textual description of the certificate's public key algorithm.

Syntax

def get_ssl_cert_public_key_algorithm() -> str: ...

ssl_cert_public_key_algorithm = property(get_ssl_cert_public_key_algorithm, None)

Default Value

""

Remarks

The textual description of the certificate's public key algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_DH") or an object identifier (OID) string representing the algorithm.

This property is read-only.

ssl_cert_public_key_length Property

The length of the certificate's public key (in bits).

Syntax

def get_ssl_cert_public_key_length() -> int: ...

ssl_cert_public_key_length = property(get_ssl_cert_public_key_length, None)

Default Value

0

Remarks

The length of the certificate's public key (in bits). Common values are 512, 1024, and 2048.

This property is read-only.

ssl_cert_serial_number Property

The serial number of the certificate encoded as a string.

Syntax

def get_ssl_cert_serial_number() -> str: ...

ssl_cert_serial_number = property(get_ssl_cert_serial_number, None)

Default Value

""

Remarks

The serial number of the certificate encoded as a string. The number is encoded as a series of hexadecimal digits, with each pair representing a byte of the serial number.

This property is read-only.

ssl_cert_signature_algorithm Property

The text description of the certificate's signature algorithm.

Syntax

def get_ssl_cert_signature_algorithm() -> str: ...

ssl_cert_signature_algorithm = property(get_ssl_cert_signature_algorithm, None)

Default Value

""

Remarks

The text description of the certificate's signature algorithm. The property contains either the name of the algorithm (e.g., "RSA" or "RSA_MD5RSA") or an object identifier (OID) string representing the algorithm.

This property is read-only.

ssl_cert_store Property

The name of the certificate store for the client certificate.

Syntax

def get_ssl_cert_store() -> bytes: ...
def set_ssl_cert_store(value: bytes) -> None: ...

ssl_cert_store = property(get_ssl_cert_store, set_ssl_cert_store)

Default Value

"MY"

Remarks

The name of the certificate store for the client certificate.

The ssl_cert_store_type property denotes the type of the certificate store specified by ssl_cert_store. If the store is password-protected, specify the password in ssl_cert_store_password.

ssl_cert_store is used in conjunction with the ssl_cert_subject property to specify client certificates. If ssl_cert_store has a value, and ssl_cert_subject or ssl_cert_encoded is set, a search for a certificate is initiated. Please see the ssl_cert_subject property for details.

Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

ssl_cert_store_password Property

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

Syntax

def get_ssl_cert_store_password() -> str: ...
def set_ssl_cert_store_password(value: str) -> None: ...

ssl_cert_store_password = property(get_ssl_cert_store_password, set_ssl_cert_store_password)

Default Value

""

Remarks

If the type of certificate store requires a password, this property is used to specify the password needed to open the certificate store.

ssl_cert_store_type Property

The type of certificate store for this certificate.

Syntax

def get_ssl_cert_store_type() -> int: ...
def set_ssl_cert_store_type(value: int) -> None: ...

ssl_cert_store_type = property(get_ssl_cert_store_type, set_ssl_cert_store_type)

Default Value

0

Remarks

The type of certificate store for this certificate.

The class supports both public and private keys in a variety of formats. When the cstAuto value is used, the class will automatically determine the type. This property can take one of the following values:

ssl_cert_subject_alt_names Property

Comma-separated lists of alternative subject names for the certificate.

Syntax

def get_ssl_cert_subject_alt_names() -> str: ...

ssl_cert_subject_alt_names = property(get_ssl_cert_subject_alt_names, None)

Default Value

""

Remarks

Comma-separated lists of alternative subject names for the certificate.

This property is read-only.

ssl_cert_thumbprint_md5 Property

The MD5 hash of the certificate.

Syntax

def get_ssl_cert_thumbprint_md5() -> str: ...

ssl_cert_thumbprint_md5 = property(get_ssl_cert_thumbprint_md5, None)

Default Value

""

Remarks

The MD5 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

ssl_cert_thumbprint_sha1 Property

The SHA-1 hash of the certificate.

Syntax

def get_ssl_cert_thumbprint_sha1() -> str: ...

ssl_cert_thumbprint_sha1 = property(get_ssl_cert_thumbprint_sha1, None)

Default Value

""

Remarks

The SHA-1 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

ssl_cert_thumbprint_sha256 Property

The SHA-256 hash of the certificate.

Syntax

def get_ssl_cert_thumbprint_sha256() -> str: ...

ssl_cert_thumbprint_sha256 = property(get_ssl_cert_thumbprint_sha256, None)

Default Value

""

Remarks

The SHA-256 hash of the certificate. It is primarily used for X.509 certificates. If the hash does not already exist, it is automatically computed.

This property is read-only.

ssl_cert_usage Property

The text description of UsageFlags .

Syntax

def get_ssl_cert_usage() -> str: ...

ssl_cert_usage = property(get_ssl_cert_usage, None)

Default Value

""

Remarks

The text description of ssl_cert_usage_flags.

This value will be one or more of the following strings and will be separated by commas:

• Digital Signature
• Non-Repudiation
• Key Encipherment
• Data Encipherment
• Key Agreement
• Certificate Signing
• CRL Signing
• Encipher Only

If the provider is OpenSSL, the value is a comma-separated list of X.509 certificate extension names.

This property is read-only.

ssl_cert_usage_flags Property

The flags that show intended use for the certificate.

Syntax

def get_ssl_cert_usage_flags() -> int: ...

ssl_cert_usage_flags = property(get_ssl_cert_usage_flags, None)

Default Value

0

Remarks

The flags that show intended use for the certificate. The value of ssl_cert_usage_flags is a combination of the following flags:

Please see the ssl_cert_usage property for a text representation of ssl_cert_usage_flags.

This functionality currently is not available when the provider is OpenSSL.

This property is read-only.

ssl_cert_version Property

The certificate's version number.

Syntax

def get_ssl_cert_version() -> str: ...

ssl_cert_version = property(get_ssl_cert_version, None)

Default Value

""

Remarks

The certificate's version number. The possible values are the strings "V1", "V2", and "V3".

This property is read-only.

ssl_cert_subject Property

The subject of the certificate used for client authentication.

Syntax

def get_ssl_cert_subject() -> str: ...
def set_ssl_cert_subject(value: str) -> None: ...

ssl_cert_subject = property(get_ssl_cert_subject, set_ssl_cert_subject)

Default Value

""

Remarks

The subject of the certificate used for client authentication.

This property must be set after all other certificate properties are set. When this property is set, a search is performed in the current certificate store to locate a certificate with a matching subject.

If a matching certificate is found, the property is set to the full subject of the matching certificate.

If an exact match is not found, the store is searched for subjects containing the value of the property.

If a match is still not found, the property is set to an empty string, and no certificate is selected.

The special value "*" picks a random certificate in the certificate store.

The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:

If a field value contains a comma, it must be quoted.

ssl_cert_encoded Property

The certificate (PEM/Base64 encoded).

Syntax

def get_ssl_cert_encoded() -> bytes: ...
def set_ssl_cert_encoded(value: bytes) -> None: ...

ssl_cert_encoded = property(get_ssl_cert_encoded, set_ssl_cert_encoded)

Default Value

""

Remarks

The certificate (PEM/Base64 encoded). This property is used to assign a specific certificate. The ssl_cert_store and ssl_cert_subject properties also may be used to specify a certificate.

When ssl_cert_encoded is set, a search is initiated in the current ssl_cert_store for the private key of the certificate. If the key is found, ssl_cert_subject is updated to reflect the full subject of the selected certificate; otherwise, ssl_cert_subject is set to an empty string.

ssl_provider Property

The Secure Sockets Layer/Transport Layer Security (SSL/TLS) implementation to use.

Syntax

def get_ssl_provider() -> int: ...
def set_ssl_provider(value: int) -> None: ...

ssl_provider = property(get_ssl_provider, set_ssl_provider)

Default Value

0

Remarks

This property specifies the SSL/TLS implementation to use. In most cases the default value of 0 (Automatic) is recommended and should not be changed. When set to 0 (Automatic), the class will select whether to use the platform implementation or the internal implementation depending on the operating system as well as the TLS version being used.

Possible values are as follows:

Additional Notes

In most cases using the default value (Automatic) is recommended. The class will select a provider depending on the current platform.

When Automatic is selected, on Windows, the class will use the platform implementation. On Linux/macOS, the class will use the internal implementation. When TLS 1.3 is enabled via SSLEnabledProtocols, the internal implementation is used on all platforms.

timeout Property

An initial timeout value to be used by incoming connections.

Syntax

def get_timeout() -> int: ...
def set_timeout(value: int) -> None: ...

timeout = property(get_timeout, set_timeout)

Default Value

30

Remarks

timeout is used by the class to set the operational timeout value of all inbound connections once they are established.

The default value is 30 seconds.

add_user Method

Adds a new user to the AuthorizedUsers collection.

Syntax

def add_user(user: str, password: str, qb_connection_string: str, auth_mode: int) -> None: ...

Remarks

Please refer to the authorized_users collection for more information.

User specifies the user which will be allowed to connect.

Password specifies the password of the user. This is not applicable when AuthMode is set to 1 (amWindows).

QBConnectionString sets the connection properties for the user. See authorized_user_qb_connection_string for details.

AuthMode defines how the user will be authenticated. There are two ways that the user may be authorized, against the user list defined in the class, or as a Windows user. From the client side the process of connecting is exactly the same no matter which option you choose. Possible values are:

When using the amNormal AuthMode (default) the user's password will be checked against the Password property.

When using the amWindows AuthMode the class will validate the user's credentials with Windows. When calling add_user the Password parameter should be set to empty string.

config Method

Sets or retrieves a configuration setting.

Syntax

def config(configuration_string: str) -> str: ...

Remarks

config is a generic method available in every class. It is used to set and retrieve configuration settings for the class.

These settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the config method.

To set a configuration setting named PROPERTY, you must call Config("PROPERTY=VALUE"), where VALUE is the value of the setting expressed as a string. For boolean values, use the strings "True", "False", "0", "1", "Yes", or "No" (case does not matter).

To read (query) the value of a configuration setting, you must call Config("PROPERTY"). The value will be returned as a string.

do_events Method

This method processes events from the internal message queue.

Syntax

def do_events() -> None: ...

Remarks

When do_events is called, the class processes any available events. If no events are available, it waits for a preset period of time, and then returns.

reset Method

Clears all properties to their default values.

Syntax

def reset() -> None: ...

Remarks

This method clears all properties to their default values.

shutdown Method

Shutdown the server.

Syntax

def shutdown() -> None: ...

Remarks

When this method is called, the class will stop listening, break all active connections, and disconnect from QuickBooks.

on_authorization Event

Fired when the client presents its credentials to the server.

Syntax

class QBConnectorAuthorizationEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def user_index() -> int: ...

  @property
  def user() -> str: ...

  @property
  def password() -> str: ...

  @property
  def accept() -> bool: ...
  @accept.setter
  def accept(value) -> None: ...

# In class QBConnector:
@property
def on_authorization() -> Callable[[QBConnectorAuthorizationEventParams], None]: ...
@on_authorization.setter
def on_authorization(event_hook: Callable[[QBConnectorAuthorizationEventParams], None]) -> None: ...

Remarks

This is where the server can decide whether to continue or not, based on the supplied User and Password.

To accept or reject a connection set Accept to True of False.

The Accept parameter defaults to True if User is found in the authorized_users collection and Password matches, and False otherwise. The UserIndex parameter indicates the index at which the authorized user was found in the collection.

A UserIndex of -1 means that no matching credentials were found in the authorized_users collection.

on_connected Event

This event is fired immediately after a connection completes (or fails).

Syntax

class QBConnectorConnectedEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class QBConnector:
@property
def on_connected() -> Callable[[QBConnectorConnectedEventParams], None]: ...
@on_connected.setter
def on_connected(event_hook: Callable[[QBConnectorConnectedEventParams], None]) -> None: ...

Remarks

If the connection is made normally, StatusCode is 0, and Description is "OK".

If the connection fails, StatusCode has the error code returned by the system. Description contains a description of this code. The value of StatusCode is equal to the value of the system error.

Please refer to the Error Codes section for more information.

on_connection_request Event

This event is fired when a request for connection comes from a remote host.

Syntax

class QBConnectorConnectionRequestEventParams(object):
  @property
  def address() -> str: ...

  @property
  def port() -> int: ...

  @property
  def accept() -> bool: ...
  @accept.setter
  def accept(value) -> None: ...

# In class QBConnector:
@property
def on_connection_request() -> Callable[[QBConnectorConnectionRequestEventParams], None]: ...
@on_connection_request.setter
def on_connection_request(event_hook: Callable[[QBConnectorConnectionRequestEventParams], None]) -> None: ...

Remarks

This event indicates an incoming connection. The connection is accepted by default. Address and Port will contain information about the remote host requesting the inbound connection. If you want to refuse it, you can set the Accept parameter to False.

on_disconnected Event

This event is fired when a connection is closed.

Syntax

class QBConnectorDisconnectedEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def status_code() -> int: ...

  @property
  def description() -> str: ...

# In class QBConnector:
@property
def on_disconnected() -> Callable[[QBConnectorDisconnectedEventParams], None]: ...
@on_disconnected.setter
def on_disconnected(event_hook: Callable[[QBConnectorDisconnectedEventParams], None]) -> None: ...

Remarks

If the connection is broken normally, StatusCode is 0, and Description is "OK".

If the connection is broken for any other reason, StatusCode has the error code returned by the system. Description contains a description of this code. The value of StatusCode is equal to the value of the system error.

Please refer to the Error Codes section for more information.

on_error Event

This event fires information about errors during data delivery.

Syntax

class QBConnectorErrorEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def error_code() -> int: ...

  @property
  def description() -> str: ...

# In class QBConnector:
@property
def on_error() -> Callable[[QBConnectorErrorEventParams], None]: ...
@on_error.setter
def on_error(event_hook: Callable[[QBConnectorErrorEventParams], None]) -> None: ...

Remarks

The on_error event is fired in case of exceptional conditions during message processing. Normally, the class fails with an error.

ErrorCode contains an error code and Description contains a textual description of the error. For a list of valid error codes and their descriptions, please refer to the Error Codes section.

ConnectionId indicates the connection for which the error is applicable.

on_header Event

HTTP headers sent by the client.

Syntax

class QBConnectorHeaderEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def header() -> str: ...

  @property
  def value() -> str: ...

# In class QBConnector:
@property
def on_header() -> Callable[[QBConnectorHeaderEventParams], None]: ...
@on_header.setter
def on_header(event_hook: Callable[[QBConnectorHeaderEventParams], None]) -> None: ...

Remarks

When a client connects, this event will fire for each HTTP header received.

on_request Event

Fired when a client sends a request to the class.

Syntax

class QBConnectorRequestEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def user_index() -> int: ...

  @property
  def request() -> str: ...

# In class QBConnector:
@property
def on_request() -> Callable[[QBConnectorRequestEventParams], None]: ...
@on_request.setter
def on_request(event_hook: Callable[[QBConnectorRequestEventParams], None]) -> None: ...

Remarks

This event will fire with the raw XML data received from the client, which is to be processed by QuickBooks.

The ConnectionId indicates which client connection this Request event is firing for. The UserIndex is the index of the user in the authorized_user array property. Request is the QBXML Request sent from the client.

A UserIndex of -1 means that no matching credentials were found in the authorized_users collection.

on_response Event

Fired when the class sends a response to the client.

Syntax

class QBConnectorResponseEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def user_index() -> int: ...

  @property
  def response() -> str: ...

# In class QBConnector:
@property
def on_response() -> Callable[[QBConnectorResponseEventParams], None]: ...
@on_response.setter
def on_response(event_hook: Callable[[QBConnectorResponseEventParams], None]) -> None: ...

Remarks

This event will fire with the raw XML retrieved from QuickBooks and sent to the client.

The ConnectionId indicates which client connection this Request event is firing for. The UserIndex is the index of the user in the authorized_user array property. Response is the QBXML Response from QuickBooks, which is being transmitted back to the client.

A UserIndex of -1 means that no matching credentials were found in the authorized_users collection.

on_ssl_client_authentication Event

This event is fired when the client presents its credentials to the server.

Syntax

class QBConnectorSSLClientAuthenticationEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def cert_encoded() -> bytes: ...

  @property
  def cert_subject() -> str: ...

  @property
  def cert_issuer() -> str: ...

  @property
  def status() -> str: ...

  @property
  def accept() -> bool: ...
  @accept.setter
  def accept(value) -> None: ...

# In class QBConnector:
@property
def on_ssl_client_authentication() -> Callable[[QBConnectorSSLClientAuthenticationEventParams], None]: ...
@on_ssl_client_authentication.setter
def on_ssl_client_authentication(event_hook: Callable[[QBConnectorSSLClientAuthenticationEventParams], None]) -> None: ...

Remarks

This event enables the server to decide whether or not to continue. The Accept parameter is a recommendation on whether to continue or to close the connection. This is just a suggestion: application software must use its own logic to determine whether or not to continue.

When Accept is False, Status shows why the verification failed (otherwise, Status contains the string "OK").

on_ssl_connection_request Event

This event fires when a Secure Sockets Layer (SSL) connection is requested.

Syntax

class QBConnectorSSLConnectionRequestEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def supported_cipher_suites() -> str: ...

  @property
  def supported_signature_algs() -> str: ...

  @property
  def cert_store_type() -> int: ...
  @cert_store_type.setter
  def cert_store_type(value) -> None: ...

  @property
  def cert_store() -> str: ...
  @cert_store.setter
  def cert_store(value) -> None: ...

  @property
  def cert_password() -> str: ...
  @cert_password.setter
  def cert_password(value) -> None: ...

  @property
  def cert_subject() -> str: ...
  @cert_subject.setter
  def cert_subject(value) -> None: ...

# In class QBConnector:
@property
def on_ssl_connection_request() -> Callable[[QBConnectorSSLConnectionRequestEventParams], None]: ...
@on_ssl_connection_request.setter
def on_ssl_connection_request(event_hook: Callable[[QBConnectorSSLConnectionRequestEventParams], None]) -> None: ...

Remarks

This event fires when an SSL connection is requested and ssl_provider is set to Internal. This event provides an opportunity to select an alternative certificate to the connecting client. This event does not fire when ssl_provider is set to Platform.

This event allows the class to be configured to use both RSA and ECDSA certificates depending on the connecting client's capabilities.

ConnectionId is the connection Id of the client requesting the connection.

SupportedCipherSuites is a comma-separated list of cipher suites that the client supports.

SupportedSignatureAlgs is a comma-separated list of certificate signature algorithms that the client supports.

CertStoreType is the store type of the alternate certificate to use for this connection. The class supports both public and private keys in a variety of formats. When the cstAuto value is used, the class will automatically determine the type. This property can take one of the following values:

CertStore is the store name or location of the alternate certificate to use for this connection.

Designations of certificate stores are platform dependent.

The following designations are the most common User and Machine certificate stores in Windows:

When the certificate store type is cstPFXFile, this property must be set to the name of the file. When the type is cstPFXBlob, the property must be set to the binary contents of a PFX file (i.e., PKCS#12 certificate store).

CertPassword is the password of the certificate store containing the alternate certificate to use for this connection.

CertSubject is the subject of the alternate certificate to use for this connection.

The special value * matches any subject and will select the first certificate in the store. The certificate subject is a comma-separated list of distinguished name fields and values. For instance, "CN=www.server.com, OU=test, C=US, E=support@nsoftware.com". Common fields and their meanings are as follows:

If a field value contains a comma, it must be quoted.

on_ssl_status Event

This event is fired to show the progress of the secure connection.

Syntax

class QBConnectorSSLStatusEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def message() -> str: ...

# In class QBConnector:
@property
def on_ssl_status() -> Callable[[QBConnectorSSLStatusEventParams], None]: ...
@on_ssl_status.setter
def on_ssl_status(event_hook: Callable[[QBConnectorSSLStatusEventParams], None]) -> None: ...

Remarks

The event is fired for informational and logging purposes only. It is used to track the progress of the connection.

on_status Event

Shows the status of the server as clients connect and transactions are made.

Syntax

class QBConnectorStatusEventParams(object):
  @property
  def connection_id() -> int: ...

  @property
  def message() -> str: ...

# In class QBConnector:
@property
def on_status() -> Callable[[QBConnectorStatusEventParams], None]: ...
@on_status.setter
def on_status(event_hook: Callable[[QBConnectorStatusEventParams], None]) -> None: ...

Remarks

The event is fired for informational and logging purposes only.

QBConnector Config Settings

The class accepts one or more of the following configuration settings. Configuration settings are similar in functionality to properties, but they are rarely used. In order to avoid "polluting" the property namespace of the class, access to these internal properties is provided through the config method.

QBConnector Config Settings

Base Config Settings

QBConnector Errors

Errors

The following errors may be generated by the class. Note that frequently the error message will contain more specific information than what is listed here.

QBConnector Errors

SSL Errors

TCP/IP Errors