Strings, including " characters in them.

[dr pepper]

In building a esp8266 web page I'm sending html and css tags as part of a string:-

content += "<div id="progress">";

As you can see I use lines content += to add some text to a string, I like to do it this way, however the word progress has quote marks around it, the arduino then breaks the sentence into 2 strings either side of 'progress' and 'thinks' the word progress is a variable and messes up.

Is there a way I can build up a string and have " marks within it, html requires them.

 

[Ian Rogers]

The arduino is based on C++ so you ned to escape the "... BUT!! this will mess the HTML code... Try the HTML quote system..
content+= "<div id=&quot;progress&quot;>";

I dont know if this will work but I know if you escape " in C/C++ The HTML code may not be able to parse it!!

 

[dr pepper]

Sussed.
You were not quite correct Mr. Rogers, it might have been that courvoisier, but you put me on the right lines.

&quot works for the text portion of a page, &quot; get lost &quot; prints:
"get lost"
But it doesnt seem to work inside html tags.
Looking at a ascii table I also found &#34 which is html for " and it works but with the same restrictions as just mentioned.
However the arduino ide has a way of dealing with this, and its simple just \" , so Serial.println("\"GET LOST\""); would print -
"GET LOST"
My modified html progress bar now does indeed work.
Thanks.

 

[Ian Rogers]

Good..At least you sorted it.... I would have thought the escape character would have messed up the HTML... Oh well, you live and learn..

 

[dougy83]

If you get tired of escaping the double-quote marks, just use single-quotes; they're just as acceptable in HTML.

e.g. content += "<div id='progress'>";

 

[dr pepper]

Thanks Doug, that would make for a more readable line of code, 'silly' is a lot neater than \"silly\".