diff --git a/scihub2pdf/__init__.py b/scihub2pdf/__init__.py
index 7b60e12..9102f91 100755
--- a/scihub2pdf/__init__.py
+++ b/scihub2pdf/__init__.py
@@ -1,4 +1,4 @@
-__version__ = "0.4.1"
+__version__ = "0.4.2"
 __license__ = "AGPLv3"
 __author__ = "Bruno Messias"
 __author_email__ = "messias.physics@gmail.com"
diff --git a/scihub2pdf/bin/scihub2pdf b/scihub2pdf/bin/scihub2pdf
index af1fe17..4d01736 100755
--- a/scihub2pdf/bin/scihub2pdf
+++ b/scihub2pdf/bin/scihub2pdf
@@ -175,7 +175,7 @@ def main():
             parser = bibtexparser.bparser.BibTexParser()
             parser.alt_dict = dict_parser
             with io.open(args[0].inputfile, "r", encoding="utf-8") as inputfile:
-                    refs_string = args[0].inputfile.read()
+                    refs_string = inputfile.read()
 
             bibtex = bibtexparser.loads(refs_string,
                                         parser=parser)
diff --git a/scihub2pdf/scihub.py b/scihub2pdf/scihub.py
index bd08822..30568b0 100755
--- a/scihub2pdf/scihub.py
+++ b/scihub2pdf/scihub.py
@@ -45,9 +45,9 @@ def __init__(self,
         self.pdf_file = None
         self.s = None
 
-
     def start(self):
         try:
+            self.s = requests.Session()
             self.driver = webdriver.PhantomJS()
         except WebDriverException:
             print("\n\t Install PhantomJS for download files in sci-hub.\n")
@@ -58,3 +58,114 @@ def start(self):
             print("\t\t sudo npm install -g phantomjs\n")
 
             sys.exit(1)
+
+    def get_session(self):
+        cookies = self.driver.get_cookies()
+        for cookie in cookies:
+            self.s.cookies.set(cookie['name'], cookie['value'])
+
+        return self.s
+
+    def download(self):
+        found, r = download_pdf(
+            self.s,
+            self.pdf_file,
+            self.pdf_url,
+            self.headers)
+
+        if not found:
+            self.driver.save_screenshot(self.pdf_file+".png")
+
+        return found,  r
+
+    def navigate_to(self, doi, pdf_file):
+        self.doi = doi
+        self.pdf_file = pdf_file
+        self.sci_url = self.domain_scihub+doi
+        print("\n\tDOI: ", doi)
+        print("\tSci-Hub Link: ", self.sci_url)
+        r = requests.get(self.sci_url)
+        found = r.status_code == 200
+        if found:
+            self.driver.get(self.sci_url)
+            self.driver.set_window_size(1120, 550)
+        else:
+            print("\tSomething is wrong with sci-hub,")
+            print("\tstatus_code: ", r.status_code)
+        return found, r
+
+    def get_captcha_img(self):
+        self.driver.execute_script("document.getElementById('content').style.zIndex = 9999;")
+        self.driver.switch_to.frame(self.el_iframe)
+        self.driver.execute_script("document.getElementById('captcha').style.zIndex = 9999;")
+        location = self.el_captcha.location
+        size = self.el_captcha.size
+        captcha_screenshot = self.driver.get_screenshot_as_base64()
+        image_b64d = b64d(captcha_screenshot)
+        if isinstance(image_b64d, string_types):
+            image = Image.open(StringIO(image_b64d))
+        else:
+            image = Image.open(BytesIO(image_b64d))
+
+        left = location['x']
+        top = location['y']
+        right = location['x'] + size['width']
+        bottom = location['y'] + size['height']
+        image = image.crop((left, top, right, bottom))
+        self.driver.switch_to.default_content()
+        return image
+
+
+    def solve_captcha(self, captcha_text):
+
+        # self.driver.save_screenshot(self.pdf_file+"before_solve.png")
+        self.driver.switch_to.frame(self.el_iframe)
+        self.el_input_text.send_keys(captcha_text)
+        # self.driver.save_screenshot(self.pdf_file+"send_keys.png")
+        self.el_form.submit()
+
+        self.driver.switch_to.default_content()
+        # with self.wait_for_page_load(timeout=10):
+        found, r = self.navigate_to(self.doi, self.pdf_file)
+        # self.driver.save_screenshot(self.pdf_file+"after_submit.png")
+        return self.check_captcha()
+
+    def get_iframe(self):
+        self.has_iframe, self.el_iframe = self.get_el(self.xpath_pdf)
+        if self.has_iframe:
+            self.pdf_url = norm_url(self.el_iframe.get_attribute("src"))
+        else:
+            self.driver.save_screenshot(self.pdf_file+".png")
+
+        return self.has_iframe
+
+    def get_el(self, xpath):
+        try:
+            el = self.driver.find_element_by_xpath(
+                xpath
+            )
+            found = True
+        except NoSuchElementException:
+            el = None
+            found = False
+
+        return found, el
+
+    def check_captcha(self):
+        print("\tchecking if has captcha...")
+        has_iframe = self.get_iframe()
+        if has_iframe is False:
+            print("\tNo pdf found. Maybe, the sci-hub dosen't have the file")
+            print("\tTry to open the link in your browser.")
+            return False, has_iframe
+
+        self.driver.save_screenshot(self.pdf_file+"check_captcha.png")
+        self.driver.switch_to.frame(self.el_iframe)
+        self.has_captcha, self.el_captcha = self.get_el(self.xpath_captcha)
+        if self.has_captcha:
+            found, self.el_input_text = self.get_el(self.xpath_input)
+            found, self.el_form = self.get_el(self.xpath_form)
+
+        self.driver.switch_to.default_content()
+
+        return self.has_captcha, has_iframe
diff --git a/setup.py b/setup.py
index 87ff368..83328a8 100755
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 setup(
     name="scihub2pdf",
-    version="0.4.1",
+    version="0.4.2",
     packages=find_packages(exclude=["build", ]),
     scripts=["scihub2pdf/bin/scihub2pdf"],
     long_description=README_TEXT,
@@ -24,7 +24,7 @@
     description="Downloads pdfs via a DOI number(or arxivId), article title or a bibtex file, sci-hub",
     author="Bruno Messias",
     author_email="messias.physics@gmail.com",
-    download_url="https://github.com/bibcure/scihub2pdf/archive/0.4.1.tar.gz",
+    download_url="https://github.com/bibcure/scihub2pdf/archive/0.4.2.tar.gz",
     keywords=["bibtex", "sci-hub", "libgen", "doi",  "science", "scientific-journals"],
 
     classifiers=[