You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: http_dynamic_size.rs
    path of file: ./repos/wasmer/examples
    
    the code of the file until where you have to start completion: use anyhow::Result;
use wasmer::{
    imports, wat2wasm, AsStoreRef, Function, FunctionEnv, FunctionEnvMut, Instance, Memory,
    MemoryView, Module, Store, WasmPtr,
};

// Utils
pub fn read_string(view: &MemoryView, start: u32, len: u32) -> Result<String> {
    Ok(WasmPtr::<u8>::new(start).read_utf8_string(view, len)?)
}

// Environment
pub struct ExampleEnv {
    memory: Option<Memory>,
}

impl ExampleEnv {
    fn set_memory(&mut self, memory: Memory) {
        self.memory = Some(memory);
    }

    fn get_memory(&self) -> &Memory {
        self.memory.as_ref().unwrap()
    }

    fn view<'a>(&'a self, store: &'a impl AsStoreRef) -> MemoryView<'a> {
        self.get_memory().view(store)
    }
}

fn http_get(m
    
fn http_get(mut ctx: FunctionEnvMut<ExampleEnv>, url: u32, url_len: u32) -> u32 {
    // Setup environment
    let (response, memory_size) = {
        // Read url from memory
        let view = ctx.data().view(&ctx);
        let memory_size = view.data_size() as usize;
        let address = read_string(&view, url, url_len).unwrap();

        // Get request
        let response = ureq::get(&address).call().unwrap();
        let capacity = match response
            .header("Content-Length")
            .map(|it| it.parse::<usize>())
        {
            Some(Ok(len)) => len,
            _ => 1024,
        };
        let mut buffer = Vec::with_capacity(capacity);
        let mut reader = response.into_reader();
        reader.read_to_end(&mut buffer).unwrap();
        (buffer, memory_size)
    };

    // If the response is too big, grow memory
    if 1114112 + response.len() > memory_size {
        let delta = (1114112 + response.len() - memory_size) / wasmer::WASM_PAGE_SIZE + 1;
        let memory = ctx.data().get_memory().clone();
        memory.grow(&mut ctx, delta as u32).unwrap();
    }

    // Write response as string [ptr, cap, len] to wasm memory and return pointer
    let view = ctx.data().view(&ctx);
    view.write(1114112, &u32::to_le_bytes(1114124)).unwrap();
    view.write(1114116, &u32::to_le_bytes(response.len() as u32))
        .unwrap();
    view.write(1114120, &u32::to_le_bytes(response.len() as u32))
        .unwrap();
    view.write(1114124, &response).unwrap();
    1114112
}