Importing posts and images from a custom CMS system

Hello everybody,

even though I am not sure this is the right forum to write this post to, I couldn’t find a better place. Plus, I’m sorry if this question has been already solved in another post, but I couldn’t find anything related to this.

Ok. Let’s say I have the need to import contents from another system, which has a number of “posts” each of them consisting of a:

* title;
* body;
* an image on the same server and included in the body by the means of the ‘img’ HTML tag.

What I want to do is the following:

1. import each image into the WordPress media manager, in a proper way (I explain this below);
2. import the title and the body
3. replacing the ‘src’ of the image in the each post’s body with the new ‘src’ according to the image importing above.

What I mean with “proper way to import images” is that I need an API (o more APIs) to import an image file into the WordPress media manager, such that I can obtain the following:

* the result of the media manager post processing (the original image, the resized ‘medium’ image, the ‘thumb’ version of the image);
* the path to each of the above, so I can accomplish the point 3. above.

I was not able to find anything useful in the WordPress documentation.

I hope I was clear enough.

Thank you all in advance.

Cheers,

Vincenzo.