Magento – How to insert the script, just after the start of the head tag using layout file in magento

I find the whole XML thing difficult so I am sympathetic to your cause here.

It looks to me like there is a discrepancy with your class name and your block XML

ie

class Crusader_CLHomePage_Block_Qwerty extends Mage_Core_Block_Template

and

    <block type="core/template" name="homepage" template="crusader/home.phtml">
        <block type="crusaderhome/qwerty" name="homeads" as="homeads" template="crusader/homeads.phtml" />
    </block>

Let's start with the block type and work backward. I think here I would expect to see something like

<block type="crusader_home/qwerty" ...

and that type would refer Magento to the class

Crusader_Home_Block_Qwerty extends Mage_Core_Block_Template

Continuing to work backward on this tack, the file app\code\local\Crusader\CLHomePage\etc\config.xml would need to be modified to something like

<global>
    <blocks>
        <crusader_home>
            <class>Crusader_Home_Block</class>
        </crusader_home>
    </blocks>
</global>

It points Magento to all classes starting 'Crusader_Home_Block_*'. And now I think you need to rename your module Crusader_Home instead of Crusader_CLHomePage and change the folder names accordingly...

AND / BUT I strongly recommend you change your module name. Only ever use one capital letter at the start of the module name not three and don't put capital letters in the middle of the name either.

You may want to look into some of the tools available for generating modules. I find them very useful for avoiding typing errors. I use this one by the very clever people at MGT Commerce (it has simplicity on its side) and this one is all-encompassing and an astonishing piece of coding by Silk Software.

***EDIT following comments below

Additionally based on the error log I think the problem is that Magento can't find your class file. So double-check the caches are refreshed or off, particularly XML cache, and that the compiler is off or re-enabled.

The problem you're experiencing is that .NET/C# is having trouble parsing the content type Magento is sending along with it's response. SOAP is notoriously finicky about receiving just the right stuff in just the right format. Couple that with PHP's rather poor implementation of the protocol and you're in for a lot of fun.

I'm looking at a Magento 1.9 for the following information:

After some digging I found that the header for the SOAP calls are set in app/code/core/Mage/Api/Model/Server/V2/Adapter/Soap.php on line 52.

51. ->clearHeaders()
52. ->setHeader('Content-Type','text/xml; charset='.$apiConfigCharset)
53. ->setBod...

Note that that Content-Type header matches your text/xml; charset=utf-8 desired charset. Adjusting line 52 to:

52. ->setHeader('Content-Type','text/xml; charset='.$apiConfigCharset, true)

tells Magento to force overwriting that header if it's already set.

Make sure to make a copy of the file with it's full path to the app/code/local/Mage/... to avoid overwriting core files. You'll thank me when you want to upgrade Magento at some point.

Also, make sure to look carefully, there's two setHeader() calls in that file.

And finally, there's also a WS-I compliant SOAP adapter available, the same fix applies to that file. You can find it in app/code/core/Mage/Api/Model/Server/Wsi/Adapter/Soap.php.