import sys

src = 'angie-Angie-1.11.8/src/http/ngx_http_header_filter_module.c'
with open(src) as f:
    content = f.read()

defs = 'static u_char ngx_http_server_string[] = "Server: Angie" CRLF;\n'
defs += 'static u_char ngx_http_server_full_string[] = "Server: " ANGIE_VER CRLF;\n'
defs += 'static u_char ngx_http_server_build_string[] = "Server: " ANGIE_VER_BUILD CRLF;\n\n'

assert defs in content, 'defs not found'
content = content.replace(defs, '')

block1 = '''    if (r->headers_out.server == NULL) {
        if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_ON) {
            len += sizeof(ngx_http_server_full_string) - 1;

        } else if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_BUILD) {
            len += sizeof(ngx_http_server_build_string) - 1;

        } else {
            len += sizeof(ngx_http_server_string) - 1;
        }
    }

'''
assert block1 in content, 'block1 not found'
content = content.replace(block1, '')

block2 = '''    if (r->headers_out.server == NULL) {
        if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_ON) {
            p = ngx_http_server_full_string;
            len = sizeof(ngx_http_server_full_string) - 1;

        } else if (clcf->server_tokens == NGX_HTTP_SERVER_TOKENS_BUILD) {
            p = ngx_http_server_build_string;
            len = sizeof(ngx_http_server_build_string) - 1;

        } else {
            p = ngx_http_server_string;
            len = sizeof(ngx_http_server_string) - 1;
        }

        b->last = ngx_cpymem(b->last, p, len);
    }

'''
assert block2 in content, 'block2 not found'
content = content.replace(block2, '')

with open(src, 'w') as f:
    f.write(content)
print('ALL_REMOVED')