Remove unescaped line termination characters from string literals if needed

[metalblue]

If the printer isn't sleeping then the status1 field frequently contains unescaped new line characters which causes the demjson3 to generate an exception.

This PR attempts to escape these new line characters if the initial parsing fails before trying to reparse the json.

[nielstron]

Thanks for adding this :) Please add a test case for the printer behaviour. Alternatively just share the raw data returned by the sleeping printer with this unescaped newline

[metalblue]

Here is the raw data (with a few values obfuscated) with the unescaped newline:

{
	status: {
		hrDeviceStatus: 3,
		status1: "   Warming Up   
 Please Wait... 


",
		status2: "",
		status3: "",
		status4: ""
	},
	identity: {
		model_name: "C480FW",
		device_name: "Samsung C480FW",
		host_name: "PRINTER",
		location: "Office",
		serial_num: "xxxxxxxxxxxxxxxxxx",
		ip_addr: "xx.xx.xx.xx",
		ipv6_link_addr : "",
		mac_addr: "xx:xx:xx:xx:xx:xx",
		admin_email: "mail@example.com",
		admin_name: "Admin
		admin_phone: "",
		customer_support: ""
	},

	toner_black: {
		opt: 1,
		remaining: 78,
		cnt: 330,
		newError: ""
	},
	toner_cyan: {
		opt: 1,
		remaining: 25,
		cnt: 563,
		newError: ""
	},
	toner_magenta: {
		opt: 1,
		remaining: 33,
		cnt: 567,
		newError: ""
	},
	toner_yellow: {
		opt: 1,
		remaining: 0,
		cnt: 569,
		newError: "C1-2150"
	},

	drum_black: {
		opt: 0,
		remaining: 84,
		newError: ""
	},
	drum_cyan: {
		opt: 0,
		remaining: 100,
		newError: ""
	},
	drum_magenta: {
		opt: 0,
		remaining: 100,
		newError: ""
	},
	drum_yellow: {
		opt: 0,
		remaining: 100,
		newError: ""
	},
	drum_color: {
		opt: 1,
		remaining: 84,
		newError: ""
	},
	
	tray1: {
		opt: 1,
		paper_size1: 1,
		paper_size2: 0,
		paper_type1: 2,
		paper_type2: 0,
		paper_level: 0,
		capa: 150,
		newError: ""
	},
	tray2: {
		opt: 0,
		paper_size1: 0,
		paper_size2: 0,
		paper_type1: 2,
		paper_type2: 0,
		paper_level: 0,
		capa: 0,
		newError: ""
	},
	tray3: {
		opt: 0,
		paper_size1: 0,
		paper_size2: 0,
		paper_type1: 2,
		paper_type2: 0,
		paper_level: 0,
		capa: 0,
		newError: ""
	},
	tray4: {
		opt: 0,
		paper_size1: 0,
		paper_size2: 0,
		paper_type1: 2,
		paper_type2: 0,
		paper_level: 0,
		capa: 0,
		newError: ""
	},
	tray5: {
		opt: 0,
		paper_size1: 0,
		paper_size2: 0,
		paper_type1: 2,
		paper_type2: 0,
		paper_level: 0,
		capa: 0,
		newError: "0"
	},
	mp: {
		opt: 0,
		paper_size1: 0,
		paper_size2: 0,
		paper_type1: 2,
		paper_type2: 0,
		paper_level: 0,
		capa: 0,
		newError: ""
	},
	manual: {
		opt: 0,
		paper_size1: 0,
		paper_size2: 0,
		paper_type1: 2,
		paper_type2: 0,
		capa: 0,
		newError: ""
	},	
	GXI_INTRAY_MANUALFEEDING_TRAY_SUPPORT: 0,
	GXI_INSTALL_OPTION_MULTIBIN:0,
	multibin: [
		0
	],
	outputTray: [
		[1, 50, ""]
	],
	capability: {
		hdd: {opt: 2, capa: 40},
		ram: {opt: 131072, capa: 131072},
		scanner: {opt: 40 , capa: 40}
	},

	options: {
		fax: 1,hdd: 0,wlan: 1,adf: 1
	},
	GXI_ACTIVE_ALERT_TOTAL: 1,
	GXI_ADMIN_WUI_HAS_DEFAULT_PASS: 0,
	GXI_SUPPORT_COLOR: 1,
	GXI_SYS_LUI_SUPPORT: 1,
	GXI_A3_SUPPORT: 0,
	GXI_TRAY2_MANDATORY_SUPPORT: 0,
	GXI_SWS_ADMIN_USE_AAA:0,
	GXI_TONER_BLACK_VALID: 1,
	GXI_TONER_CYAN_VALID: 1,
	GXI_TONER_MAGENTA_VALID: 1,
	GXI_TONER_YELLOW_VALID: 1,
	GXI_IMAGING_BLACK_VALID: 1,
	GXI_IMAGING_CYAN_VALID: 1,
	GXI_IMAGING_MAGENTA_VALID: 1,
	GXI_IMAGING_YELLOW_VALID: 1,
	GXI_IMAGING_COLOR_VALID: 1,
	GXI_SUPPORT_PAPER_SETTING: 1,
	GXI_SUPPORT_PAPER_LEVEL: 0,
	GXI_SUPPORT_MULTI_PASS : 1
}

[metalblue]

Should have said. when the printer is "Sleeping" the status1 always appears to be Sleeping... and there isn't an issue. Its when the printer isn't sleeping that I see the issue.

[erkr]

For me that same behaviour. Only see these errors when using the printer

[metalblue]

@nielstron any chance this PR could be approved?

[nielstron]

Yes totally. There should be a new testcase though based on the raw data you shared. I can have a look if I can add it myself.

[erkr]

Yes please, 🙏

[nielstron]

superseded by #62

[erkr]

Thanks. Looking forward for the HA Release with this fix 😊